Answer:
a)
b)
Explanation:
a)
We can use conservation of energy between these heights.
Therefore, the lost energy is:
b)
The force acting along the distance create a work, these work is equal to the potential energy.
Let's solve it for F.
Therefore, the force is:
I hope is helps you!
A car driving up a hill at a constant speed experiences no change in its kinetic energy while it's potential energy increases with increasing height, thus none of the options are correct.
Understanding the concept
Consider a car moving up the hill at a constant speed as shown in the figure below. The following forces act on the car:
Here as the car is moving up the hill at a constant speed, the net force exerted on the car is zero. Also, the kinetic energy of the car will not change as its velocity is constant and the potential energy will change with increasing height. Thus, none of the given options are correct.
Learn more about motion on an incline here:
<u>brainly.com/question/13513083</u>
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