a 100 kg mass dropped from a height of 3.0 m. the kinetic energy before striking the ground is

Answer 1

To find the kinetic energy before the mass strikes the ground, we can use the formula for kinetic energy:

Kinetic Energy = (1/2) * mass * velocity^2

Given:
Mass (m) = 100 kg
Height (h) = 3.0 m
Acceleration due to gravity (g) = 9.8 m/s^2 (assuming no air resistance)

First, we need to find the velocity of the mass just before it hits the ground using the equation for potential energy:

Potential Energy = mass * gravity * height

Potential Energy = 100 kg * 9.8 m/s^2 * 3.0 m
= 2940 J

Since the potential energy is converted into kinetic energy as the mass falls, the kinetic energy just before striking the ground is equal to the potential energy.

Therefore, the kinetic energy before striking the ground is 2940 Joules.