Unit 4&5 Comp Quiz

Last updated 3 days ago

16 questions

1

Library

Unit 4&5 Comp Quiz

Last updated 3 days ago

16 questions

1

What is the tangential velocity of a 0.081 kg tetherball that rotates in a circle with a radius of 0.58 m above the top of the pole accelerating at 31.6m/s2? Do not worry about the units.

1

A water balloon is thrown directly down at an innocent bystander below. The soon-to-be-punished fraternity student hurled the balloon at 21m/s, and it accelerated due to gravity for 1.4 seconds. How fast was the balloon traveling before it hit the innocent bystander? Ignore units.

1

A toy unicorn is thrown off the top of the WHS balcony horizontally at 8m/s and lands gracefully 3s later. What is the unicorn's horizontal distance from the balcony?

1

A toy unicorn is thrown off the top of the WHS balcony horizontally at 8m/s and lands gracefully 3s later. How high is the balcony?

1

What is the value of the vertical acceleration as a projectile rises?

1

A student swings a yo-yo above her head in a uniform circular motion with the mass rotating 1.4m away from her body, the center of rotation. Select the overhead drawing that illustrates the centripetal acceleration.

A student swings a yo-yo above her head in a uniform circular motion with the mass rotating 1.4m away from her body, the center of rotation. What affect does tripling the length of the yo-yo string used in uniform circular motion have on centripetal acceleration if all other factors are held constant?

centripetal acceleration will increase by factor of 9

centripetal acceleration will triple

centripetal acceleration will decrease by 1/3

centripetal acceleration will not change

A dart is fired from two nerf dart guns at the same time. Gun A is pointed horizontal. Gun B is 35 degrees above the horizontal. What occurs?

Darts from both guns land at the same time in the same place

The darts have different heights but travel the same horizontal distance.

Darts from gun A travel further than gun B

Darts from gun B travel further than gun A

What is the tangential velocity of a 0.081 kg tetherball that rotates in a circle with a radius of 0.58 m above the top of the pole accelerating at 31.6m/s2? Do not worry about the units.

What is the magnitude and direction of the centripetal force of a naughty teen that is driving donuts in a parking lot in a 770kg car in a radius of 12m at 8m/s?

4,107 N to the center of the donut

4,107 N away from the center of the donut

6,160 N to the center of the donut

6,160 N away from the center of the donut

A water balloon is thrown directly down at an innocent bystander below. The soon-to-be-punished fraternity student hurled the balloon at 21m/s, and it accelerated due to gravity for 1.4 seconds. How fast was the balloon traveling before it hit the innocent bystander? Ignore units.

A kite is blown with a velocity of 35m/sec at an angle of 20 degrees. Find the components.

30E and 18N (m/s)

12N and 33E (m/s)

33N and 12E (m/s)

18E and 30N (m/s)

A marble is launched by dropping it through a marble launcher. The marble took 0.37s to land 0.64m from where it was launched. Find the horizontal velocity of the marble as it launches.

0.27m/s 

1.7m/s

0.58m/s 

0.67m/s 

As a projectile travels through the air its horizontal velocity will be...

Accelerating horizontally

Perpendicular to the ground

Constant until it stops

Slowed by gravity

What can be correctly state about a cow’s vertical acceleration when launched over a barn?

Decreases

Increases

There is no vertical acceleration

Doesn’t change

A bullet is fired above the horizontal forward. If the bullet is travelling at 200 m/s and it takes .3s to reach the target, neglecting air resistance. Which of the following are correct statements? Select all that apply.

A toy unicorn is thrown off the top of the WHS balcony horizontally at 8m/s and lands gracefully 3s later. What is the unicorn's horizontal distance from the balcony?

A toy unicorn is thrown off the top of the WHS balcony horizontally at 8m/s and lands gracefully 3s later. How high is the balcony?

What is the value of the vertical acceleration as a projectile rises?

What is the relationship between the total time of a projectile's flight and the time it takes to rise?

total time = twice time to rise

total time = time to rise

total time = half time to rise

total time has no relationship with time to rise

Where along a vertical projection's path is the vertical velocity zero?

Never

Top

Beginning

End

A student swings a yo-yo above her head in a uniform circular motion with the mass rotating 1.4m away from her body, the center of rotation. Select the overhead drawing that illustrates the centripetal acceleration.

A student swings a yo-yo above her head in a uniform circular motion with the mass rotating 1.4m away from her body, the center of rotation. What affect does tripling the length of the yo-yo string used in uniform circular motion have on centripetal acceleration if all other factors are held constant?

centripetal acceleration will increase by factor of 9

centripetal acceleration will triple

centripetal acceleration will decrease by 1/3

centripetal acceleration will not change

A dart is fired from two nerf dart guns at the same time.  Gun A is pointed horizontal. Gun B is 35 degrees above the horizontal.  What occurs?

Darts from both guns land at the same time in the same place

The darts have different heights but travel the same horizontal distance.

Darts from gun A travel further than gun B

Darts from gun B travel further than gun A

What is the magnitude and direction of the centripetal force of a naughty teen that is driving donuts in a parking lot in a 770kg car in a radius of 12m at 8m/s?

4,107 N to the center of the donut

4,107 N away from the center of the donut

6,160 N to the center of the donut

6,160 N away from the center of the donut

A kite is blown with a velocity of 35m/sec at an angle of 20 degrees.  Find the components.  

30E and 18N (m/s)

12N and 33E (m/s)

33N and 12E (m/s)

18E and 30N (m/s)

A marble is launched by dropping it through a marble launcher.  The marble took 0.37s to land 0.64m from where it was launched.  Find the horizontal velocity of the marble as it launches.

0.27m/s 

1.7m/s

0.58m/s 

0.67m/s 

As a projectile travels through the air its horizontal velocity will be...

Accelerating horizontally

Perpendicular to the ground

Constant until it stops

Slowed by gravity

What can be correctly state about a cow’s vertical acceleration when launched over a barn?

Decreases

Increases

There is no vertical acceleration

Doesn’t change

A bullet is fired above the horizontal forward. If the bullet is travelling at 200 m/s and it takes .3s to reach the target, neglecting air resistance.  Which of the following are correct statements? Select all that apply.

Displacement is constant

Acceleration is constant

Vy increase going up decreases going down

Vx increase going up decreases going down

The horizontal velocity is constant

The vertical velocity is constant

Vx decrease going up increases going down

Position is constant

Displacement increases

Vy decrease going up increases going down

What is the relationship between the total time of a projectile's flight and the time it takes to rise?

total time = twice time to rise

total time = time to rise

total time = half time to rise

total time has no relationship with time to rise

Where along a vertical projection's path is the vertical velocity zero?

Never

Top

Beginning

End