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 ▸Explain the different types of wave.
Two students are provided with a starting pistol, a stopwatch and a long measuring tape. The starting pistol produces a loud sound and a puff of smoke. Describe how the students use the apparatus to calculate the speed of sound.
What name is given to the phenomena which results in longer wavelengths of light being observed from distant galaxies and why does this occur?
Describe thermal conduction