Chapter 11, Problem 58A

(a)

To determine

To Draw: The energy bar diagram for the given process.

Answer to Problem 58A

The energy bar diagram of an ice cube that is initially at rest and then slides down a frictionless slope is shown in Figure 1.

Explanation of Solution

Given:

An ice cube is initially at rest. It slides down a slop that is frictionless.

According to the conservation of energy for an isolated system, the energy can neither be created nor be destroyed. However, it can be converted from one form of energy into another.

An ice cube is initially at rest providing the maximum potential energy.

When the ice cube slides down on a frictionless slope, the potential energy of the ice cube is converted into kinetic energy. So, the energy bar diagram representing the given situation is shown below:

  

Figure 1

Conclusion:

The energy bar diagram for the given process is shown in Figure 1.

(b)

To determine

To draw: The energy bar diagram for the given process.

Answer to Problem 58A

The energy bar diagram of an ice cube that is initially moving slides up a frictionless slope, and finally comes to rest is shown in Figure 2.

Explanation of Solution

Given:

An ice cube is initially moving. It slides up on a slope that is frictionless and finally comes to rest.

An ice cube is initially moving which provides maximum kinetic energy.

When the ice cube comes to rest by sliding up on a frictionless slope, the kinetic energy of the ice cube is converted into its potential energy.

So, the energy bar diagram representing the given situation is shown below:

  

Figure 2

Conclusion:

The energy bar diagram for the given process is shown in Figure 2.