Question

Julie is cycling at a speed of 3.4 meters/second. If the combined mass of the bicycle and Julie is 30 kilograms, what is the kinetic energy?
A. 1.7 × 102 joules
B. 1.5 × 102 joules
C. 2.0 × 102 joules
D. 2.2 × 102 joules

Answer 1

Option A. 1.7*10^2 joules

The formula for kinetic energy is (mv^2)/2

Here m is 30kg.

v is 3.4m/s

Therefore Kinetic energy =(30*3.4*3.4)/2

=173.40 joules or 1.7*10^2 joules