A ball of mass 500g is dropped from rest 2m above the ground. When it reaches the ground it is travelling at 5m/s. How much energy has been dissipated?
Initial energy (Gravitational Potential): E = mgh = 0.5 x 9.81 x 2 = 9.81J Final energy (Kinetic): E = mv2/2 = (0.5 x 52)/2 = 6.25J Energy lost = 9.81 - 6.25 = 3.56J
GB
Related Physics GCSE answers
All answers ▸Compare the wavelength, frequency and speed of an emitted and reflected microwave
What is the difference between alpha and gamma radiation?
Explain what led to the plum pudding model of the atom being replaced by the nuclear model of the atom.
A hair dryer uses 2000J in 5 seconds when on full power. The power used is?