Ch 6 Test Physics

3

A 12 kg mass is moving to the right with a velocity of 16.5 m/s. A 14 kg mass is moving to the left with a velocity of 15 m/s. Assuming that these two objects have a head-on collision and separate after, what will be the final velocity of the 12 kg mass if the final velocity of the 14kg mass is 6 m/s?
Round your answer to a whole number. Show your work for partial credit. 1 pt for the correct formula, 1 pt for substituting givens, 1 pt for the correct answer with units.

3

Suppose that you have a mass of 50 kg and are standing still on frictionless roller skates. Someone then throws you a ball with 6.2 kg mass with a velocity of +27 m/s and you catch it. What will be your resultant velocity?
Round your answer to the hundredth place (2 decimal). Show your work for partial credit. 1 pt for the correct formula, 1 pt for substituting givens, 1 pt for the correct answer with units.

3

A 0.5 kg ball has a change of momentum equaling 4 N•s when colliding with a wall for 0.10 s. What is the average force on the ball?
Round your answer to a whole number. Show your work for partial credit. 1 pt for the correct formula, 1 pt for substituting givens, 1 pt for the correct answer with units.

2

The object's mass is 7 kg. What is the change in velocity of the object at the end of its journey (5 seconds total)?
Round your answer to the hundredth place (2 decimals). Show your work for partial credit. 1 pt for the correct formula but the wrong answer. 2 pts for the correct answer.

1

What is the net impulse on the object from 0-15 seconds according to the graph?
Note: There is no partial credit for this question. It is worth 1 point. Please take your time and double-check your work before submitting it.

1

What velocity must a 1340 kg car have in order to have the same momentum as a 2680 kg truck traveling at a velocity of 15 m/s to the west?

60 m/s to the east

60 m/s to the west

30 m/s to the west

30 m/s to the east

1

What is the change in momentum of the white sphere?

-20 kg•m/s

+30 kg•m/s

+5 kg•m/s

+15 kg•m/s

1

What is the total momentum before the collision?

25 kg•m/s

15 kg•m/s

35 kg•m/s

10 kg•m/s

1

Is it possible for two objects to have different speeds, yet have the same momentum?

Yes if their masses are the same

Yes if their masses are different

No, they cannot have the same momentum

1

How do airbags reduce your chance of getting hurt (decrease the force you experience) during an accident?

Airbags increase momentum before collision

Airbags reduce momentum during a collision

Airbags increase the time it takes a person to stop moving

Airbags cause friction

1

When comparing the momentum of two moving objects, which of the following is correct?

The less massive object will have less momentum if the velocities are the same.

The more massive object will have less momentum if the velocities are the same.

The more massive object will have less momentum if its velocity is greater.

The object with the higher velocity will have less momentum if the masses are equal.

1

Two objects stick together and move with a common velocity after colliding. Identify the type of interaction.

inelastic

explosive

elastic

implosive

1

Two objects move separately after colliding, and the total momentum remains constant. Identify the type of interaction.

elastic

explosive

inelastic

implosive

1

Two objects start together but then separate, and the total momentum remains constant. Identify the type of interaction.

inelastic

elastic

implosive

explosive

1

A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.

The child has a greater momentum than the bike.

The bike has a greater momentum than the child.

Neither the child nor the bike has momentum.

Both the child and the bike have the same momentum.

1

A soccer ball collides with another soccer ball at rest. The total momentum of the soccer balls

remains constant.

is zero

decreases

increases

1

Which of the following objects have momentum? Select all that apply.

A tick walking across the back of your dog Fido.

A high school building sits in the middle of town.

A UPS truck is stopped in front of a school building.

An electron is orbiting the nucleus of an atom.

A Mini Cooper is moving with constant speed.

Ɛhia

1

Consider the interaction between a large cannon and the cannonball that it fires. During the explosion, which object experiences the greatest ...

Ɛhia

1

What is true for the velocity of the blue wagon in this collision?

velocity increases and changes direction

velocity decreases

velocity decreases and changes direction

velocity increases

Ɛhia

3

Sort the following Physics quantities based on being Scalars or Vectors.

acceleration
mass
impulse
force
velocity
momentum
displacement
speed
time
position
distance

Scalar
Vector

1

What magnitude must vector A have in order to have a Net Force of 17 N to the right?

8 N

17 N

25 N

42 N

1

Draggable item		Corresponding Item
		A rightward force is applied to a book in order to move it across a desk with a rightward acceleration.
		A rightward force is applied to a book in order to move it across a desk at constant velocity.
		A car is coasting to the right and slowing down.
		An egg is free-falling from a nest in a tree.
		A flying squirrel is moving through the sky with terminal velocity.

1

Sort each diagram based on the topics below.

A
B
C
D

Balanced forces acting on person
Person is accelerating
Diagram with terminal velocity

1

Which is true for the Speed Time Graph above?

A person walks away from the origin, take a break, and then walks further away from the origin. Finally, they return back to the origin.

A person increases their speed to 15 m/s then takes a break. After their break, they decide to run again until they reach a speed of 25 m/s. After they reach this high speed, they return to the origin

A person accelerates to a fast constant speed, then decides to accelerate more. Once they reach their highest speed of 25 m/s, they slow down their speed.

1

What is the acceleration of the person from 0 to 10 seconds?

1.5 m/s

15 m/s/s

1.5 m/s/s

15 m/s

1

In which section(s) do you have a constant positive velocity?

0 - 1s

1 - 3s

3 - 4.5s

4.5 - 6

1

Sort each characteristic based on the Newton's law that it corresponds to. Each characteristic will be used once.

law of inertia
law of acceleration
law of action-reaction
objects will continue doing what they are currently during until an unbalanced force acts on it
the acceleration of an object depends on the force applied and the mass of it
forces always act in equal and opposite directions
A passenger in a moving car who is not wearing a seat belt will be thrown forward when the car suddenly stops because he remains in motion.
It takes a smaller extra force to propel a small yacht at sea than to propel a supertanker because the latter has a greater mass than the former.
When you push on a wall, the wall pushes back on you.

Newton's First Law of Motion
Newton's 2nd Law of Motion
Newton's 3rd Law of Motion

1

Projectiles: Horizontal vs Vertical

velocity is constant
acceleration is 0 m/s/s
velocity is changing
acceleration is -9.8m/s/s

Horizontal
Vertical

	Cannon	cannonball	both the same
force?
time duration (t) of the force?
impulse (F•t)?
momentum change?
change of velocity?
mass?
acceleration?

	Cannon	cannonball	both the same
force?
time duration (t) of the force?
impulse (F•t)?
momentum change?
change of velocity?
mass?
acceleration?

Ch 6 Test Physics

The object's mass is 7 kg. What is the change in velocity of the object at the end of its journey (5 seconds total)?Round your answer to the hundredth place (2 decimals). Show your work for partial credit. 1 pt for the correct formula but the wrong answer. 2 pts for the correct answer.

What is the net impulse on the object from 0-15 seconds according to the graph?Note: There is no partial credit for this question. It is worth 1 point. Please take your time and double-check your work before submitting it.

What velocity must a 1340 kg car have in order to have the same momentum as a 2680 kg truck traveling at a velocity of 15 m/s to the west?

What is the change in momentum of the white sphere?

What is the total momentum before the collision?

Is it possible for two objects to have different speeds, yet have the same momentum?

How do airbags reduce your chance of getting hurt (decrease the force you experience) during an accident?

When comparing the momentum of two moving objects, which of the following is correct?

Two objects stick together and move with a common velocity after colliding. Identify the type of interaction.

Two objects move separately after colliding, and the total momentum remains constant. Identify the type of interaction.

Two objects start together but then separate, and the total momentum remains constant. Identify the type of interaction.

A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.

A soccer ball collides with another soccer ball at rest. The total momentum of the soccer balls

Which of the following objects have momentum? Select all that apply.

Consider the interaction between a large cannon and the cannonball that it fires. During the explosion, which object experiences the greatest ...

What is true for the velocity of the blue wagon in this collision?

Sort the following Physics quantities based on being Scalars or Vectors.

What magnitude must vector A have in order to have a Net Force of 17 N to the right?

Sort each diagram based on the topics below.

Which is true for the Speed Time Graph above?

What is the acceleration of the person from 0 to 10 seconds?

In which section(s) do you have a constant positive velocity?

Sort each characteristic based on the Newton's law that it corresponds to. Each characteristic will be used once.

Projectiles: Horizontal vs Vertical

The object's mass is 7 kg. What is the change in velocity of the object at the end of its journey (5 seconds total)?Round your answer to the hundredth place (2 decimals). Show your work for partial credit. 1 pt for the correct formula but the wrong answer. 2 pts for the correct answer.

What is the net impulse on the object from 0-15 seconds according to the graph?Note: There is no partial credit for this question. It is worth 1 point. Please take your time and double-check your work before submitting it.

What velocity must a 1340 kg car have in order to have the same momentum as a 2680 kg truck traveling at a velocity of 15 m/s to the west?

What is the change in momentum of the white sphere?

What is the total momentum before the collision?

Is it possible for two objects to have different speeds, yet have the same momentum?

How do airbags reduce your chance of getting hurt (decrease the force you experience) during an accident?

When comparing the momentum of two moving objects, which of the following is correct?

Two objects stick together and move with a common velocity after colliding. Identify the type of interaction.

Two objects move separately after colliding, and the total momentum remains constant. Identify the type of interaction.

Two objects start together but then separate, and the total momentum remains constant. Identify the type of interaction.

A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.

A soccer ball collides with another soccer ball at rest. The total momentum of the soccer balls

Which of the following objects have momentum? Select all that apply.

Consider the interaction between a large cannon and the cannonball that it fires. During the explosion, which object experiences the greatest ...

What is true for the velocity of the blue wagon in this collision?

Sort the following Physics quantities based on being Scalars or Vectors.

What magnitude must vector A have in order to have a Net Force of 17 N to the right?

Sort each diagram based on the topics below.

Which is true for the Speed Time Graph above?

What is the acceleration of the person from 0 to 10 seconds?

In which section(s) do you have a constant positive velocity?

Sort each characteristic based on the Newton's law that it corresponds to. Each characteristic will be used once.

Projectiles: Horizontal vs Vertical

The object's mass is 7 kg. What is the change in velocity of the object at the end of its journey (5 seconds total)?
Round your answer to the hundredth place (2 decimals). Show your work for partial credit. 1 pt for the correct formula but the wrong answer. 2 pts for the correct answer.

What is the net impulse on the object from 0-15 seconds according to the graph?
Note: There is no partial credit for this question. It is worth 1 point. Please take your time and double-check your work before submitting it.

The object's mass is 7 kg. What is the change in velocity of the object at the end of its journey (5 seconds total)?
Round your answer to the hundredth place (2 decimals). Show your work for partial credit. 1 pt for the correct formula but the wrong answer. 2 pts for the correct answer.

What is the net impulse on the object from 0-15 seconds according to the graph?
Note: There is no partial credit for this question. It is worth 1 point. Please take your time and double-check your work before submitting it.