Momentum SG

a ball with a momentum of 4 kgm/s hits a wall and bounces straight back without losing any KE what is the change in the ball's momentum

-8.0 kgm/s

two objects, one of mass 3 kg and moving with a speed of 2 m/s and the other of mass 5 kg and speed 2 m/s, move toward each other and collide head-on if the collision is perfectly inelastic, find the speed of the objects after the collisions

.5 m/s

to friction less carts (mass=500 g each) are sitting at rest on a perfectly level table the teacher taps the release so that one cart pushes off the other if one of the carts has a speed of 2 m/s, then what is the final momentum of the system (in kgm/s)

0

A ball of mass .5 kg, initially at rest, acquires a speed of 4 m/s immediately after being kicked by force of strength 20 N. For how long did this force act on the ball

0.1 s

object 1 moves towards object 2, whose mass is twice that of object one and which is initially at rest after their impact, the objects lock together and move with what fraction of object one initial KE

1/3

a box with a mass of 2 kg accelerates in a straight line from 4 m/s to 8 m/s due to the application of the force whose duration is .5 s find the average strength of this force

16 N

8.2 kg baseball is pitched with a velocity of 40 m/s and is then batted to the pitcher with a velocity of 60 m/s what is the magnitude of change in the ball's momentum

20 kgm/s

a ball of mass m traveling horizontally with velocity v strikes a massive vertical wall and rebounds back along its original direction with o change in speed. what is the magnitude of the impulse delivered by the wall to the ball?

2mv

an object of mass 2 kg has a linear momentum of magnitude 6 kgm/s what is this objects KE

9J

which of the following best describes a perfectly inelastic collision free of external forces

KE is never conserved

a wooden block of mass m is moving at speed v in a straight line how fast would the bullet of mass m need to travel to stop the block (assuming that the bullet became embedded inside)

MV/m

which of the following statements properly relates the variables in the equation FΔt=Δp

a large constant force acting over a long time interval causes a large change in momentum

if a force is exerted on an object, which statement is true

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

which of the following situations is an example of a significant change in momentum

a tennis ball is hit into a net

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 20 kg shopping cart moving at a velocity of .5 m/s collides with a stone wall and stops the momentum of the shopping cart

decreases

Two billiard balls collide. Identify the type of collision.

elastic

After colliding, objects are deformed and lose some kinetic energy. Identify the type of collision.

inelastic

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

is greater down the hill than up the hill

a billiard ball collides with a stationary identical billiard ball in an elastic head on collision after the collision, which of the following is true of the first ball

it comes to rest

in a two body collision,

momentum is always conserved

which of the following statements about the conservation of momentum is not correct

momentum is not conserved for a system of objects in a head on collision

which of the following best describes the momentum of two bodies after a two body collision if the KE of the system is conserved

must also be conserved

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

perfectly inelastic

a rubber ball moving at a speed of 5 m/s hit a flat wall and returned to the thrower at 5 m/s the magnitude of the momentum of the rubber ball

remained the same

a soccer ball collides with another soccer ball at rest the total momentum of the balls

remains constant

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.

the child has a greater momentum then the bike

two objects move toward each other, collide, and separate. if there was no net external force acting on the objects but some KE was lost, then

the collision was not elastic and total linear momentum was conserved

Two objects with different masses collide and bounce back after an elastic collision. Before the collision, the two objects were moving at velocities equal in magnitude but opposite in direction. After the collision,

the less massive object had gained momentum

the law of conservation of momentum states that

the total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects

Two skaters stand facing each other. One skater's mass is 60 kg, and the other's mass is 72 kg. If the skaters push away from each other without spinning,

their momentum are equal but opposite

Two swimmers relax close together on air mattresses in a pool. One swimmer's mass is 48 kg, and the other's mass is 55 kg. If the swimmers push away from each other,

their momentum are equal but opposite

a billiard ball collides with a second identical ball in an elastic head on collision what is the KE of the system after the collision compared with the KE before the collision

unchanged

a person sitting in a chair with wheels stands up causing the chair to roll back across the floor the momentum of the chair

was 0 while stationary and increased when the person stood

which of the following equations can be used to directly calculate the change in an object's momentum

Δp=FΔt