Momentum/Impulse DOL

A 5 N force is applied to a 3 kg ball to change its velocity by 6 m/s. What was the time it took to change the velocity?

• 3.6 sec

• 10.3 sec

• 18 sec

• 45 sec

A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the     change in the object's velocity? 

• 6.3 m/s
• 3.2 m/s
• 1.2 m/s 
• 4.33 m/s

Tags

NGSS.HS-PS2-1

The velocity of a 975-kg car is changed by 15.0 m/s in 15s by an external, constant force. What is the magnitude of the force?

• 975 N

• 1460 N

• 9750 N

• 9758 N

A 0.02 kg bug is flying South at 1.5 m/s. What force would stop it in 0.01 second?

• 0.024 N

• 150 N

• 3 N

• 0.75 N

What is the momentum of the object in the image?

• 8 $\frac{kg\cdot m}{s}$

• 2 $\frac{kg\cdot m}{s}$
  

• 15 $\frac{kg\cdot m}{s}$

• -15 $\frac{kg\cdot m}{s}$

What is the correct unit for impulse?

• Ns

• $\frac{kg\cdot m}{s}$

• Newton

• $\frac{N}{s}$
  

What is impulse?

• Change in energy.

• Change in work.

• Change in momentum.

• Change in force.

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s. Calculate the impulse on the ball.

• 1 N⋅s

• 6 N⋅s

• 33.3 N⋅s

 $F\Delta t=m\Delta V$  What is the force experience if a 3 kg object has a velocity of 12 m/s over a time of 2 sec?

• 15 N

• 0.25 N

• 4 N

• 18 N

 $F\Delta t=m\Delta V$  What is the force experience if a 13 kg object has a velocity of 8 m/s over time frame of 3 sec?

• 104 N

• 34.7 N

• 8 N

• -1.63 N