Question 1 (1 point)
saved
the product of an object's mass and velocity is it's

question 1 options:

inertia

acceleration

weight

momentum

question 2 (1 point)
is there ever a situation where an ant will have more momentum than an elephant? explain why or why not?

question 2 options:

no, an ant can't move fast enough.

no, an elephant has too much mass.

yes, if the ant is standing still.

yes, if the elephant is standing still.

question 3 (1 point)
football player position mass (kg) velocity (m/s)
tight end 90 6
fullback 110 5
lineman 120 3

the game is on the line and it's your job to pick one football player to give the ball to run for the winning touchdown. you do not want the opposing team to stop him, therefore, you want the one with the largest momentum. which player would you pick? momentum = mass times velocity
question 3 options:

lineman

tight end

fullback

question 4 (1 point)
the change in momentum of an object is equal to the

question 4 options:

impulse acting on it.

force acting on it times its velocity.

change in velocity of the object.

question 5 (1 point)
serena williams can serve a tennis ball with 750 newtons of force. the ball and racquet are in contact for 0.003 seconds. what is the impulse exerted on the tennis ball?

impulse = f ∙ t

question 5 options:

250,000 n∙s

0.0004 n∙s

2.25 n∙s

question 6 (1 point)
which is an example of an explosion?

question 6 options:

two cars collide and move off together.

a cannon firing.

a bowling ball hitting the pins.

soccer player kicking a ball into the goal.

question 7 (1 point)
saved
a charging football player tackles a second player that is at rest. they move together as they fall. this is a(n) collision.
question 7 options:

elastic

explosion

inelastic

question 8 (1 point)
suppose car 1 collides with car 2; car 2 was not moving. in an ideal situation with no friction, according to the law of conservation of momentum, what happens to the momentum after the collision?

question 8 options:

it stays the same

it is slightly larger

it is slightly reduced

it is greatly reduced

question 9 (1 point)
in billiards (pool) there is a collision between the cue ball (white) and all the other balls on the break. before the collision, only the cue ball is moving. after the collision, all the balls have velocity. which statement is true about the momentum before and after the collision?

question 9 options:

each pool ball gains as much momentum as the cue ball loses.

when the cue ball contacts the other balls, momentum is transferred causing them to gain momentum and speed.

after the collision, there is more momentum than before the collision.

question 10 (1 point)
a train car moving along at 3 m/s runs into another train car at rest on the track. the cars attach together and continue moving in the same direction. the velocity of both cars together after the collision is

question 10 options:

exactly 3 m/s.

less than 3 m/s.

more than 3 m/s.