1. True or false: One watt is the unit of power equivalent to 1 joule per second. 2. How many watts of power are expended when a force of 6 N moves a book 2 m in a time interval of 3 s? 3. A car is...

1. True or false: One watt is the unit of power equivalent to 1 joule per second.

2. How many watts of power are expended when a force of 6 N moves a book 2 m in a time interval of 3 s?

3. A car is lifted a certain distance in a service station and therefore has potential energy with respect to the floor. If the car were lifted twice as high, how much potential energy would it have?