Question

A car has a kinetic energy of 41.6 kJ.
The speed of the car is 8.0 m/s.
Calculate the mass of the car.

Answer 1

Answer:

Explanation: as we know K.E = 1/2 (mv²)

here v=8m/s K.E = 41.6 kJ = 4160×10³

so m=2×4160×10³/64

m = 130×10³ kg

hope it will help

Answer 2

Answer:

So we know KE=1/2mv²

We will know that

mass=KE÷ (0.5×V²)

mass=41.6÷ (0.5×8²)

8²= 64

0.5×64= 32

41.6÷ 32= 1.3kg

Answer= 1.3kg

Explanation:

You simply rearrange the formula to put mass as the subject, then solve the equation!

Good luck guys <3