Question

A 2-kg bowling ball rolls at a speed of 10 m/s on the ground. Circle one: KE / GPE / both Show your work for finding the values of each type of energy the object has:

Answer 1

Kinetic energy: 100 J. Potential energy: 0

Explanation:

- The kinetic energy of an object is given by:

`KE=(1)/(2)mv^2`

where m is the mass of the object and v is its speed.

In this problem, we have:

m = 2 kg is the mass of the ball

v = 10 m/s is its speed

Substituting into the formula, we find:

`KE=(1)/(2)(2 kg)(10 m/s)^2=100 J`

- The gravitational potential energy of an object is given by:

`GPE=mgh`

where g is the acceleration due to gravity and h is the heigth of the object above the ground.

Since the ball in this problem is rolling on the ground, we have h=0, therefore its potential energy is zero:

GPE = 0