A yellow ball with a mass of 2 kg is rolling across the floor at 3 m/s. A red ball with a mass of 3 kg is rolling across the same floor at 3 m/s. Which ball has greater kinetic energy, and why? The yellow ball has greater kinetic energy, because it is rolling at a higher position above the ground.
The red ball has greater kinetic energy, because it has a greater mass.
The yellow ball has greater kinetic energy, because it is rolling at a greater speed.
The red ball has greater kinetic energy, because it is releasing more thermal energy.

The red ball has a greater KE because it has a greater mass.

Explanation:

The formula for calculating Kinetic energy is 1/2(mv^2) (speed can be used for velocity)

so, the yellow ball will be 1/2(2*3^2=1/2(2*9)=18/2=9J

the red ball will be 1/2(3*3^2)=1/2(3*9)=27/2=13.5J

Since the red ball has more Joules of energy, it has more KE.

Hope this helps!

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.