Question

A 35 kg child has 190 J of kinetic energy after sledding down a hill. What is the child's speed in meters per second at the bottom of the hill?

Answer 1

Given: Mass= 35kg

Ekinetic= 190 J

Analysis: Ek= mv^2/2

solution: 190J=35v^2/2

V=square root(2×190)÷2= 3.2 m/s