A 5 kg block is released from rest at the top of a frictionless plane of length

Question

A 5 kg block is released from rest at the top of a frictionless plane of length 9 m that is inclined at an angle of 11 degrees to the horizontal. A cord is attached to the block and trails along behind it. When the block reaches a point 3 m along the incline from the top, someone grasps the cord and pulls it parallel to the incline. They pull hard enough that the block comes to rest just as it reaches the bottom of the incline. Let's call the height at the bottom of the incline y = 0. Which of the following type or types of energy does the block have when it is at the top of the incline? Gravitational Potential Energy Kinetic Energy Elastic Potential Energy It has no energy

Explanation / Answer

since it started from rest v = 0

KE = 0

therefore

5)

it has only gravitational potential energy

answer

a) Gravitational Potential Energy

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