You accelerate your car from rest at a constant rate down a straight road, and reach 22.0 m/s in 117 s. the tires on your car have radius 0.320 m. assuming the tires rotate in a counterclockwise direction, what is the angular acceleration of the tires?

For this case, the first thing to do is find the linear acceleration of the car.

We have then:

Where,

v: speed

t: time

Substituting values we have:

We are now looking for angular acceleration.

For this, we use the following equation:

Where,

a: linear acceleration

r: radius of the tires

Substituting values we have:

The angular acceleration of the tires is:

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

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