a stone of mass 0.5kg is drop from a height of 12m. calculate; it's kinetic energy. (g=10m/s2).
K.E=P.E=m×g×h
=0.5×10×12
=60J
Hope it helps.
Diamond
KE at impact=PE at start= m*g*h
To calculate the kinetic energy of the stone, you can use the formula:
Kinetic Energy (KE) = 1/2 * mass * velocity^2
Given:
Mass (m) = 0.5 kg
Gravity (g) = 10 m/s^2
Height (h) = 12 m
We need to find the velocity of the stone when it hits the ground. To do that, we can use the principle of conservation of energy. The potential energy of the stone when it is at a height of 12m is equal to its kinetic energy when it hits the ground.
Potential Energy (PE) = m * g * h
Substituting the given values:
PE = 0.5 kg * 10 m/s^2 * 12m
PE = 60 Joules
Since the potential energy and kinetic energy are equal, we can say:
KE = PE = 60 Joules
Therefore, the kinetic energy of the stone is 60 Joules.