Momentum, Impulse and Collisions

A bow has a mass of 3 kg and the arrow has a mass of 0.9 kg. If the velocity of the arrow is 125 m/s after it was launched, what is the recoil velocity of the bow?

• $m_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}$

• $m_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f$

• $0=m_1v_1+m_2v_2$

• $p=mv$

• $J=m\Delta v$

Tags

NGSS.HS-PS2-2

Steven rolls a 5.2 kg bowling ball down the lane and hits a 1.2 kg pin at rest. The ball had an initial velocity of 10 m/s before the collision. The pin goes flying off at 8.3 m/s. What is the final velocity of the ball?

• $m_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}$

• $m_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f$

• $0=m_1v_1+m_2v_2$

• $p=mv$

• $\Delta p=Ft$

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Giselle and Brock were hanging out one afternoon. Giselle rolled a 5 kg bowling ball down the sidewalk to the east at 7 m/s. At the same time, Brock threw a piece of 3.8 kg clay to the west and the two objects collide. If both objects come to rest immediately after the collision, what was the speed of the clay before hitting the bowling ball?

• 
  

  $0=m_1v_1+m_2v_2$
  

• $m_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f$

• $0=m_1v_1+m_2v_2$

• $Ft=m\Delta v$

• $J=Ft$

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

What impulse must Cheyenne apply to a 0.7 kg softball to cause a velocity change of 43 m/s?

• $Ft=m\Delta v$

• $\Delta p=Ft$

• $J=\Delta p$

• $J=Ft$

• $J=m\Delta v$

A snow boarder applied a constant braking force of 600 N for 12 seconds when traveling at 22 m/s. Find the magnitude of the impulse applied to stop the snowboarder.

• 
  

  $J=Ft$

• $J=\Delta p$
  

• $J=m\Delta v$

• $\Delta p=Ft$

• $m_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}$

Tags

NGSS.HS-PS2-1

A 72 kg snow boarder applied a constant braking force of 600 N when traveling at 22 m/s. Find the magnitude of the impulse applied to stop the snowboarder.

• $0=m_1v_1+m_2v_2$

• $Ft=m\Delta v$

• $m_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f$

• $J=Ft$

• $J=m\Delta v$

Tags

NGSS.HS-PS2-1

Noelia decides she really wants to play volleyball now. She picks up a 0.32kg volleyball that is initially at rest and hits it. After 0.4 seconds of contact, the ball leaves her hand with a speed of 26 m/s. Find the magnitude of the average force exerted by the volleyball on her hand.

•  $J=\Delta p$  

•  $J=Ft$  

•  $Ft=m\Delta v$  

•  $m_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f$  

•  $m_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}$  

Tags

NGSS.HS-PS2-1

A 0.7 kg toy car has a momentum of 13 kg*m/s. What is the car’s speed?

• $J=\Delta p$

• $J=Ft$

• $p=mv$

• $m_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f$

• $0=m_1v_1+m_2v_2$

Tags

NGSS.HS-PS2-1

If an object having a mass of 10 kg is acted upon by a force that causes its speed to increase from 16 m/s to 20 m/s, the impulse causing this change in speed is _______?

• $0=m_1v_1+m_2v_2$

• $m_1v_{1i}+m_2v_{2i}=\left(m_1+m_2\right)v_f$

• $m_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}$

• $J=m\Delta v$

• $Ft=m\Delta v$

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

In the diagram below, a 45 kg roller-skater exerts an 8 newton force on a 50 kg roller-skater for 0.4 seconds. What is the magnitude of the impulse applied to the 50 kg roller-skater?

• $Ft=m\Delta v$

• $J=Ft$

• $J=\Delta p$

• $\Delta p=Ft$

• $p=mv$

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2