Momentum & Impulse in 2D Video Lessons

Concept

# Problem: Answer all the questions in more details for full credit.MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The speed of a 4-kg ball with a momentum of 12 kg m/s isA) 4 m/s. B) 3 m/s. C) 48 m/s D) 12 m/s E) none of the above 2) The impulse-momentum relationship is a direct result of A) Newton's law of gravity.  B) Newton's 2nd law. C) Newton's 1st law.D) Newton's 3rd law 3) Which produces more force: driving into a very massive concrete wall with no "give," or having a head-on collision with an identical car moving toward you at the same speed? A) wall B) carC) both the same  D) need more information 4) A karate chop is more effective if one's hand A) extends the time upon impact. B) bounces upon impact. C) follows through upon impact. 5) The change in momentum that occurs when a 1.0 kg ball traveling at 4.0 m/s strikes a wall and bounces back at 2.0 m/s is A) 2 kg m/s B) 6 kg m/s C) 4 kg m/s D) 8 kg m/s. 6) A 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball initially at rest. The bowling ball and putty then move with a momentum of A) 1 kg m/s. B) 5 kg m/s. C) 2 kg m/s. D) 0 kg m/s. E) more than 5 kg m/s. 7) A 5000-kg freight car moving at 2 m/s collides with a 10,000-kg freight car at rest. They couple upon collision and move away at A) 1 m/s. B) 1/3 m/s C) 2 m/s. D) 2/3 m/s 8) A firecracker bursts while freely falling. The combined momentum of its fragments A) cancels to zero. B) equals the momentum of the firecracker at the time of burst.C) cancels to the firecracker's momentum at the time of bursting. D) none of the above

###### FREE Expert Solution

1)

Momentum:

$\overline{){\mathbf{P}}{\mathbf{=}}{\mathbf{m}}{\mathbf{v}}}$,

97% (476 ratings)
###### Problem Details

Answer all the questions in more details for full credit.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) The speed of a 4-kg ball with a momentum of 12 kg m/s is

A) 4 m/s.

B) 3 m/s.

C) 48 m/s

D) 12 m/s

E) none of the above

2) The impulse-momentum relationship is a direct result of

A) Newton's law of gravity.

B) Newton's 2nd law.

C) Newton's 1st law.

D) Newton's 3rd law

3) Which produces more force: driving into a very massive concrete wall with no "give," or having a head-on collision with an identical car moving toward you at the same speed?

A) wall

B) car

C) both the same

4) A karate chop is more effective if one's hand

A) extends the time upon impact.

B) bounces upon impact.

C) follows through upon impact.

5) The change in momentum that occurs when a 1.0 kg ball traveling at 4.0 m/s strikes a wall and bounces back at 2.0 m/s is

A) 2 kg m/s

B) 6 kg m/s

C) 4 kg m/s

D) 8 kg m/s.

6) A 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball initially at rest. The bowling ball and putty then move with a momentum of

A) 1 kg m/s.

B) 5 kg m/s.

C) 2 kg m/s.

D) 0 kg m/s.

E) more than 5 kg m/s.

7) A 5000-kg freight car moving at 2 m/s collides with a 10,000-kg freight car at rest. They couple upon collision and move away at

A) 1 m/s.

B) 1/3 m/s

C) 2 m/s.

D) 2/3 m/s

8) A firecracker bursts while freely falling. The combined momentum of its fragments

A) cancels to zero.

B) equals the momentum of the firecracker at the time of burst.

C) cancels to the firecracker's momentum at the time of bursting.

D) none of the above