Question

A toy rocket has a velocity of 40 m/s and a kinetic energy of 2000 j. calculate its mass.

Answer 1

2.5 kg

Step-by-step explanation:

Kinetic Energy = 1/2 m * v^2

2 * KE / v^2 = m 2 * 2000 / ( 40^2) = 2.5 kg