Question

8. Calculate the kinetic energy of a rock that has a mass of 55 kg rolling

down a hill with a velocity of 8 m/s (DOK2)
your Iwer

Answer 1

1760J

Explanation:

Given parameters:

Mass of rock = 55kg

Velocity = 8m/s

Unknown:

Kinetic energy = ?

Solution:

The kinetic energy of a body is the energy to motion of a body.

K.E =
`(1)/(2)` m v²

where m is the mass and v is the velocity

Insert the parameters and solve;

K.E =
`(1)/(2)` x 55 x 8² = 1760J