Agrindstone spinning at the rate of 8.3 rev's has what approximate angular speed? a. 3.2 rad/s b. 26 rad/s e. 52 rad/s d. 8t rad/s

52 rad/s

Explanation:

The rate at which the grindstone is spinning is 8.3 revolutions per second

This means that every second the grindstone completes 8.3 revolutions

A radian is basically the arc length of a circle.

Converting it to radians per second

8.3×2π = 16.6π = 52.15 radians per second

∴ Approximate angular speed is 52 radians per second

less than one you can't create energy

the total distance traveled by the car is

30km + 49km = 79 km .