What is the mass of an object travelling at 15 m/s with a kinetic energy of 100 J?
Kinetic Energy (Ek) = 1/2(mv2).This can be rearranged such that, m = (2Ek)/v2we know from the question that Ek = 100 J and we know that v = 15 m/sso plugging in the numbers, we get m = (2 x 100)/(15)2 = 200/225 = 0.89 Kg (to 3 significant figures)
TD
Related Physics GCSE answers
All answers ▸A wave with a constant velocity doubles its frequency. What happens to the wavelength?
A car is travelling at 10m/s. It then accelerates at a constant rate.Find the time taken for the car to travel 1km if the car’s final velocity is then 22m/s .
Explain how the evaporation of a liquid causes the temperature of the remaining liquid to decrease.
If an object of mass 6kg was dropped from a height 35m (initially at rest), how long would it take to reach the ground under free fall?