# Question #4444b

##### 3 Answers

#### Answer:

I found 224Joules

#### Explanation:

Kinetic energy is equal to:

Assuming there are no losses, the speed is constant = 8m/s

So,

#### Answer:

#### Explanation:

If we also take into account the rotational kinetic energy due to the rolling motion, then we get :

where R is the radius of the solid sphere.

But since the linear and angular velocities may be related by the equation

#### Answer:

KE =

#### Explanation:

The question phrasing implies frictionless motion, and NO dimensions of the mass are given, so shape is irrelevant (and also rotational motion).

Some equations posted omitted the "1/2" and are incorrect.