Impulse and Momentum Review

A 1000 kg car accelerates from 2.0 m/s to 6.0 m/s in 5.0 s. What is the magnitude of the

car’s final momentum?

• 0.8 kg x m /s

• 800 kg x m /s

• 4000 kg x m /s

• 6000 kg x m /s

Tags

NGSS.HS-PS2-2

A truck with a mass of m collides inelastically with a car with a mass of m. The velocity of the truck is v, and the car is at rest. In terms of the given quantities, what is the final momentum of the system?

• M_tV / (M_t+M_c)

• M_t V + M_cV

• M_cV

• M_tV

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A steel ball, a rubber ball, a wet ball of clay, and a golf ball of the same mass are dropped from rest 10.0 m above the ground. The steel ball rebounds from the ground at a speed 1/4 of its impact speed, the rubber ball rebounds with a speed 3/4 of its impact speed, the wet ball of clay sticks to the ground and comes to rest, and the golf ball rebounds with a speed of 1/2 its impact speed. Which ball received the greatest impulse from the ground?

• steel ball

• rubber ball

• clay ball

• golf ball

Tags

NGSS.HS-PS2-2

______________ is a force acting over some amount of time to cause a change in momentum

• Work

• Impulse

• Energy

• Power

Tags

NGSS.HS-PS2-2

A baseball player hits a baseball, changing its momentum by 15 kgm/s. The net force on the ball is 7100N. How long does the bat maintain contact with the ball?

• 0.0021 s

• 106500 s

• 473.3 s

• 2 s

Answer explanation

$F\cdot t\ =\ \Delta p$

Tags

NGSS.HS-PS2-1

A cow with mass m is moving with a velocity v. The cow - sensing danger - speeds up to 3v. The cow's momentum ____.

• remains the same

• Gets cut in half

• Gets cut in third

• Gets tripled

Answer explanation

p = m x v

Tags

NGSS.HS-PS2-2

A(n) ____________ causes and is equal to a change in momentum

• force

• impact

• impulse

• collision

Tags

NGSS.HS-PS2-2

Calculate the impulse experienced by a 0.168 kg tennis ball encountering a force of 126 N that changes its velocity by 61.8 m/s

• 10.4 Ns

• 7786 Ns

• 2.03 Ns

• 21.1

Answer explanation

$Impulse\ =\ \Delta p$

Tags

NGSS.HS-PS2-1

A 7.0 kg cannonball flying rightward at 12 m/s hits a stationary rock. The cannonball keeps moving the same direction at 2.0 m/s after the collision but sends the rock flying at 14 m/s towards the right. What is the mass of the rock?

• 0.43 kg

• 84 kg

• 5.0 kg

• 6.0 kg

Tags

NGSS.HS-PS2-2

What is the velocity of the objects after the collision?

• 0.7 m/s

• 5.2 m/s

• 156 m/s

• 0 m/s

Tags

NGSS.HS-PS2-2