Physics Midterm

When comparing the momentum of 2 moving objects, which of the following is correct?

• the object with the higher velocity will have less momentum if the masses are equal

• the more massive object will have less momentum if its velocity is greater.

• the less massive object will have less momentum if the velocities are the same

• the more massive object will have less momentum if the velocities are the same

Tags

NGSS.HS-PS2-2

Two vehicles, a car and a truck, have identical velocities. The truck has 3 times the mass of the car. Compare the momentum of each object.

• The truck has 3x the momentum of the car.

• The car has 3x the momentum of the truck.

• The truck has 1/3 the momentum of the car.

• The momentum of each is equal.

Tags

NGSS.HS-PS2-2

A heavy object and a light object have the same momentum. Which has the greater speed?

• Heavy object

• Light object

• Both have the same speed

What is the symbol used for momentum?

• m

• t

• p

• v

If the impulse acting on two objects is the same then

• the mass of both objects is the same

• the change in velocity of both objects is the same

• the change in momentum of both objects is the same

• the amount of contact time is the same

• the force exerted on both objects is the same

Tags

NGSS.HS-PS2-2

A 0.05 kg lump of clay moving horizontally at 12 m/s strikes and sticks to a stationary 0.10 kg cart that can move on a frictionless air track. Determine the speed of the cart and clay after the collision.

• 2 m/s

• 4 m/s

• 6 m/s

• 8 m/s

• 12 m/s

How do crumple zones protect us?

• They increase the force by increasing the contact time

• They decrease the force by decreasing the contact time

• They increase the force by decreasing the contact time

• They decrease the force by increasing the contact time

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

Before the canon fires a cannon ball, both sit at rest. A person can confidently say the total momentum is...

• zero
• non-zero

When two objects interact in an isolated system,

• the momentum of each object is conserved

• the total momentum of the system is zero

• the total momentum is conserved only if the objects move in

  opposite directions

• the total momentum is always conserved

A 60 kg basketball player stands still to catch a ball. The player catches the 0.15 kg ball flying horizontally at a velocity of 34 m/s. What is the player’s velocity immediately after catching and holding onto the ball?

• 0.15 m/s
• 0.085 m/s
• -0.085 m/s
• -0.15 m/s