A cart was allowed to roll down a ramp from rest. It reached the bottom of the ramp with a speed of 25 cm/s. A student could conclude that the cart -

a. gained mass
b. accelerated down the ramp
c. lost energy
d. moved at a constant speed

accelerated down the ramp

Explanation:

It can be concluded that the cart accelerated down the ramp is the correct choice.

Acceleration is the rate of change of velocity with time.

We see that as time increases, the velocity of the car also increase.

 Initially, the car is at rest with a velocity of 0cm/s. With the passage of time, as it slides down the ramp, the velocity increases to 25cm/s.

Since acceleration is the rate of change of velocity with time, it is glaring that the acceleration of the body greatly increased as it moves down the ramp

the independent variable, or the one that is intentionally manipulated is the speed.

wavelength divides in half and speed stays the same.