On a force versus change in position graph, the area under the curve is a representation of:

Bob (80 kg) uses 180 N of force to get him up the slope. The vertical distance is 2 m and the diagonal is 10 m. Calculate the work he does.

The roller coaster car has a mass of 500 kg. It is pulled from position 1 to 2 (30 m) by a motor. At the top of the ride the vertical distance top to bottom is 20 m. The motor pulls the car with a 4000 N force. Calculate the work done getting the car to the top of the ride.

Where does the pendulum have the greatest kinetic energy?

Where does the pendulum have the greatest potential energy? (pick 2)

A 1kg stone is dropped down from a height of 2m on a vertically fixed spring of spring constant k = 200 Nm^-1. The maximum energy stored in the spring subsequently is ( in Joules )

What is the mechanical energy of the system? (ignore friction)

A weight-lifter raises a 2000N weight through a vertical height of 2.0m in 0.80s. What useful power does he develop in doing this?

A loco engine of mass 40 ton moves on a track having $$\mu\ =\ 0.01$$ . When its speed is 72 kmh^-1 , power developed by engine is 880 kW. Its acceleration at that instant is (in ms^-2)