Ignoring air resistance, use an energy argument to find the speed of a ball when it hits the ground if it is dropped from 50m, where m is the mass of the ball.
Original energy: GPE=509.81m KE=0 Final energy: GPE=0 KE=(1/2)mv2 Therefore (1/2)mv2 = 50m9.81 . The m cancels and simplifying the equation we are left with v2 = 5029.81, therefore v = 31 ms-1
ZT
Related Physics A Level answers
All answers ▸Describe how the strong nuclear force between nucleons varies with seperation of the nucleons.
Explain why excited atoms only emit certain frequencies of radiation after an electron collides with the atom
Compare and contrast geostationary and low polar orbits.
What is the Rutherford scattering experiment and what did it tell us about the nature of the atom?