Question

A 31 kg child is traveling at 4 m/s while sledding down a hill. What is the child's kinetic energy at the bottom of the hill?

Answer 1

K.E = 248 J

Step-by-step explanation:

Since the child is travelling at a given velocity. The kinetic energy of the child down the hill can be given by the following formula:

`K.E = (1)/(2)mv^2\\`

where,

m = mass of the child = 31 kg

v = velocity of the child = 4 m/s

Therefore,

`K.E = (1)/(2)(31\ kg)(4\ m/s)^2\\`

K.E = 248 J