What is the volume of 1.5 Tonne of sand of density 2600 kg/m3?  

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration