Question

Ka Lon pushed a 18 kg ball off of a bridge. The ball's velocity just before

it hit the water below was 23 meters per second. Find the ball's kinetic
energy.
4761 Joules
414 Joules
207 Joules
9522 Joules

Answer 1

4761J

Step-by-step explanation:

Given parameters:

Mass of the ball = 18kg

Velocity before it hits the water below = 23m/s

Unknown:

Kinetic energy of the ball = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as:

Kinetic energy =
`(1)/(2)` m v²

m is the mass

v is the velocity

So;

Kinetic energy =
`(1)/(2)` x 18 x 23² = 4761J