WORK

Two people push a cart up a 2m tall ramp. It takes them 43s. The cart is 100Kg. Find the power developed.

A car produces 175horsepower. How many joules would it use every hour?

If the car from #2 has 48000J of motion energy and weighs 1000Kg, then what is its velocity?

How much energy would the brakes have to expend to stop the car from #2?

If you use a 100w bulb in your bathroom, how many Kilowatt-hour would it use if it were on for 24hours?

A 40Kg stone sitting on a cliff could fall at any moment. How much PE does it have?

You apply a force of 90N for 3m and in 2sec. Find power.

If you have a power of 200w and you moved a box 4m in 10sec, how heavy was the box in Kg?

Make a drawing on back of this sheet that shows some of the energy conversions happening in a city. For example, a car is changing chemical energy into Kinetic energy & sound energy…. Be creative, and use all the types listed here. LIGHT, SOUND, HEAT, CHEMICAL, ELECTRICAL, RADIANT, NUCLEAR, MECHANICAL, POTENTIAL