Learn these formulas.
kinetic energy = (1/2) M V^2
potential energy = M g H
g is the acceleration of gravity, and H is the height above ground. M and V have obvious meanings
Now, do the calculations.
For energy in joules, mass M must be in kg.
A) Calculate the kinetic energy of a 5.0g bullet travelling with a velocity of 400^ms-1.
B) Calculate the gravitational potential energy relative to the ground when a bird of mass 105g is 400m above the ground.
1 answer
1 answer