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9-29 Newton's Laws Mixed Practice

Last updated almost 3 years ago
38 questions
Note from the author:
F=ma Fwt = mg g=9.8m/s2

m=F/a

a=F/m
F=ma Fwt = mg g=9.8m/s2

m=F/a

a=F/m

Force & Weight

Weight (W) is the measure of gravity’s pull on an object. To calculate weight, you multiply mass (kg)
by gravity (m/s2). Recall that 1 kg x 1 m/s2 = 1 kgm/s2 = 1 Newton (N). So, W = Fg = mg. After solving
for the mass, you can then work with Newton’s 2nd Law (ΣF=ma). Answer these questions.
2

What net force is required to accelerate a car at a rate of 2 m/s2 if the car has a mass of 3,000 kg?

2

A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?

2

What is the mass of a falling rock if it produces a force of 147 N?

2

What is the mass of a truck if it produces a force of 14,000 N while accelerating at a rate of 5 m/s2?

2

What is the acceleration of softball if it has a mass of 0.5 kg and hits the catcher's glove with a force of 25 N?

2

Sally has a car that accelerates at 5 m/s2. If the car has a mass of 1000 kg, how much force does the car produce?

Free-body diagrams for four situations are shown below. For each situation, determine the net force acting upon the object. Be sure to give the magnitude, unit, and direction of the net force. If no net force is present, just answer "balanced.

1

What is the net force for Situation A?

1

What is the net force for Situation C?

1

What is the net force for Situation B?

1

What is the net force for Situation D?

2

What can you say about the motion for Situation A?

2

What can you say about the motion for Situation B?

2

What can you say about the motion for Situation C?

2

What can you say about the motion for Situation D?

2

What is the Weight of the object in Situation C?

2

What is the mass of the object in Situation C?

Free-body diagrams for four situations are shown below. The net force is known for each situation. However, the magnitudes of a few of the individual forces are not known. Analyze each situation individually and determine the magnitude of the unknown forces.

1

What is the magnitude of Force A?

1

What is the magnitude of Force C?

1

What is the magnitude of Force D?

1

What is the magnitude of Force E?

1

What is the magnitude of Force G?

1

If force F has a value of 100 N, what is force H's value?

The object is moving up the ramp.

1

Which is the applied force?

1

Which is the weight?

1

Which is the normal force?

1

Which is the frictional force?

1

As an astronaut travels to Jupiter (higher acceleration due to gravity) their mass ____ and their weight ____

1

Which law states that every action has an equal and opposite reaction?

1

Which law states that every action has an equal and opposite reaction?

1

Which law explains why a smaller child will move faster if pushed on ice skates compared to a larger adult?

1

If a bucket of Mickey Popcorn is loose on the monorail, what direction will it go as the monorail accelerates forward?

1

If a bucket of Mickey Popcorn is loose on the monorail, what direction will it go as the monorail makes an abrupt left turn?

1

Which force would be responsible for a deceleration as an object slides across a surface?

1

Watch this video: https://www.youtube.com/watch?v=2k-2IlJcaHg
If you are riding the Tower of Terror (large elevator ride), what can be said about the forces on you as the elevator rockets up?

1

Watch this video: https://www.youtube.com/watch?v=2k-2IlJcaHg
If you are riding the Tower of Terror (large elevator ride), what can be said about the forces on you as the elevator rockets up?
Draw the Free Body Diagram for the scenario

Drawing Free Body Diagrams: Label all forces acting in these scenarios
1

A book is at rest on the table

1

A wagon is pulled by a rope to the left across a level surface

1

A couch is being pushed to the right up a ramp.