Physics, 17.02.2021 19:10 alanizyc

Determine the magnitude and direction of the momentum of a 60 kg runner going 2.4 m/s towards the north.

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Answer from: ivymckinney21

6. A stationary skateboarder I with a mass of 50 kg pushes a stationary skateboarder II

with a mass of 75 kg. After the push the skateboarder II moves with a velocity of 2 m/s to

the right. What is the velocity of the skateboarder I?

A. 3 m/s to the left

B. 2 m/s to the left

C. 1 m/s to the right

D. 3 m/s to the right

E. 2 m/s to the right

7. A loaded freight car A with a mass of 24,000 kg moves at a constant velocity of 8 m/s

on a horizontal railroad track and collides with an

empty stationary car B with a mass of 8,000 kg.

After the collision the cars stick to each other and

moves like one object. What is the velocity of two

cars after the collision?

A. 2 m/s B. 4 m/s C. 6 m/s D. 8 m/s D. 12 m/s

8. A 40 kg skateboarder runs at a constant velocity of 12 m/s and

jumps to a stationary skateboard with a mass of 8 kg. What is the

velocity of the skateboard after the jump?

A. 12 m/s B. 90 m/s C. 60 m/s D. 20 m/s E. 10 m/s

9. An 80 kg diver jumps off a moving boat. The boat has

a mass of 400 kg and moves at a constant velocity of 2

m/s. What is the velocity of the boat after the jump if the

diver jumps with a velocity of 3 m/s in opposite

direction to the initial velocity of the boat?

A. 2 m/s B. 3 m/s C. 4 m/s D. 5 m/s E. 6 m/s

10. Block A with a mass 2m moves on a frictionless

horizontal surface at a constant speed v and collides

inelastically with B of mass m. What is the velocity of

two blocks after the collision?

A. v B. !

v C. !

v D. ?

v E.!

11. Block A with a mass m moves on a frictionless

horizontal surface at a constant velocity v and collides

elastically with an identical block B. What is the velocity

of block A after the collision?

A. 0 m/s B. v C.!

v D. !

v E. !

v6. A stationary skateboarder I with a mass of 50 kg pushes a stationary skateboarder II

with a mass of 75 kg. After the push the skateboarder II moves with a velocity of 2 m/s to

the right. What is the velocity of the skateboarder I?

A. 3 m/s to the left

B. 2 m/s to the left

C. 1 m/s to the right

D. 3 m/s to the right

E. 2 m/s to the right

7. A loaded freight car A with a mass of 24,000 kg moves at a constant velocity of 8 m/s

on a horizontal railroad track and collides with an

empty stationary car B with a mass of 8,000 kg.

After the collision the cars stick to each other and

moves like one object. What is the velocity of two

cars after the collision?

A. 2 m/s B. 4 m/s C. 6 m/s D. 8 m/s D. 12 m/s

8. A 40 kg skateboarder runs at a constant velocity of 12 m/s and

jumps to a stationary skateboard with a mass of 8 kg. What is the

velocity of the skateboard after the jump?

A. 12 m/s B. 90 m/s C. 60

Answer from: Quest

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Answer from: Quest

newton's first law of motion

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Determine the magnitude and direction of the momentum of a 60 kg runner going 2.4 m/s towards the no...

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