Question

A cellphone weighing 80 g is flying to the air at 15 m/s what is it's kinetic energy​

Answer 1

9J

Step-by-step explanation:

Given parameters:

Mass of cell phone = 80g

1000g = 1kg

80g is therefore 0.08kg

Velocity of the cellphone = 15m/s

Unknown:

Kinetic energy of the cellphone = ?

Solution:

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

It is expressed as:

K.E =
`(1)/(2)` mv² =
`(1)/(2)` x 0.08 x 15² = 9J