Answer:
The angle of the ramp
Explanation:
Since there is no external acceleration mentioned in the question, thus the only acceleration acting on the cart which is on the ramp is the acceleration due to gravity.
The acceleration due to gravity is not the property of the cart or any external force and hence, does not depend on the length of the ramp but will depend on the angle of the ramp.
The more the angle of the ramp, the more will be the gravitational acceleration.
