Momentum and Collisions

When comparing the momentum of two 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

A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.

• Both the child and the bike have the same momentum

• the bike has a greater momentum than the child

• the child has a greater momentum than the bike

• neither the child nor the bike has momentum

Tags

NGSS.HS-PS2-2

A roller coaster climbs up a hill at 4 m/s and then zips down the hill at 30 m/s. The momentum of the roller coaster

• is greater up the hill than down the hill

• is greater down the hill than up the hill

• remains the same throughout the ride

• is zero throughout the ride

Tags

NGSS.HS-PS2-2

If a force is exerted on an object, which statement is true?

• a large force always produces a large change in the object's momentum

• a large force produces a large change in the object's momentum only if the force is applied over a very short time interval

• a small force applied over a long time interval can produce a large change in the object's momentum

• a small force produces a large change in the object's momentum

Tags

NGSS.HS-PS2-1

In a two-body collision,

• momentum is always conserved

• kinetic energy is always conserved

• neither momentum nor kinetic energy is conserved

• both momentum and kinetic energy are always conserved

Tags

NGSS.HS-PS2-2

Two billiard balls collide. Identify the type of collision.

• elastic

• INelastic

A billiard ball collides with a stationary identical billiard ball in an elastic head-on collision. After the collision, which fo the following is true of the first ball?

• it maintains its initial velocity

• it has one-half its initial velocity

• it comes to rest

• it moves in the opposite direction

Tags

NGSS.HS-PS2-2

Which of the following has the greatest momentum?

• a tortoise with a mass of 275 kg moving at a velocity of 0.55 m/s

• a hare with a mass of 2.7 kg moving at a velocity of 7.5 m/s

• a turtle with a mass of 91 kg moving at a velocity of 1.4 m/s

• a roadrunner with a mass of 1.8 kg moving at a velocity of 6.7 m/s

Tags

NGSS.HS-PS2-2

A 0.2 kg baseball is pitched with a velocity of 40 m/s and is then batter to the pitcher with a velocity of 60 m/s. What is the magnitude of change in the ball's momentum?

• 2 spootons

• 4 spootons

• 8 spootons

• 20 spootons

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Two balls of dough collide and stick together. Identify the types of collision.

• elastic

• INelastic