Question

An object's momentum is defined as its mass multiplied by its velocity (p = mv) and it is measured in kilogram meters per second (kg⋅m/s). Students designed an experiment to test what happens to momentum when a moving object solids with an object that is stationary. The students used carts on a track along with speed sensors. They varied the mass of Cart A during the trials but kept the initial velocity constant. Cart B was stationary and its mass remained constant. The students used the speed sensors to determine the speed of Cart A plus Cart B after the collision. Because the cars had magnetized sides, they stuck together and the collision was inelastic. Momentum is conserved for collisions between objects in an isolated system: momentum lost by one object is equal to the momentum gained by another object. This law allows us to predict the before and after collision velocities of an object.

The students conducted a fifth trial. In this trial, they kept the mass of Cart A at 4 kg but increased the mass of Cart B to 4 kg as well. Based on the previous collected data, what can you say about the final velocity of cars A and B?

A) It would be less than the initial velocity.
B) It would be the same as the initial velocity.
C) It would be greater than the initial velocity.
D) Both carts would stop moving. Velocity would equal 0m/s.

Answer 1

I BELIEVE IT IS C

Answer 2

I think it's either C or D.

Answer 3

IT WAS A

Answer 4

Does it give you an explanation? o:

Answer 5

yes

Answer 6

for this one:

It would be less than the initial velocity. The collision is a perfectly elastic collision in which both objects combine into a single body and move together after the collision. By applying the law of conservation of linear momentum, it is found that the final velocity should be 1.0 m/s

Answer 7

I'm sorry. >.<