Work Worksheet 2

A 70Kg person runs at 3m/s. Find KE

A 190-lb. person runs at 5mi/hr. Find KE

A cycle rolls with 10000J of KE at 2m/s. Find its mass in Kg.

A rock on top of a 30m tall hill has 2500J of PE, what is mass of rock?

A 1Kg book has 60J of PE. How high up is it?

If a car uses 470J every 3-sec, find its wattage.

If Mock operates at 90 watts, how many Joules does he use every hour?

How much work can a 100w light bulb do in one hour?

You slide a 40Kg box 2 meters in 3 seconds. Find power developed.

IF a kilowatt-hour is 8.5 cents at Mock's house, how much would it cost him to leave a 1500w hair dryer on for one whole day?

(This is like a speed=dist/time problem…. The speed is the wattage, the time is time, and the distance is the money you pay! First find how many kilowatts Mock used.)

How far can you slide a 100Kg object in 4 seconds if you can only use 1000w?

How much will 500w worth of power accelerate a 2Kg mass across 5m of space in 6 seconds?