Question

A car has a kinetic energy of 103J

the speed of the car is 13. 1 m/s
calclate the mass of the car
give anwser in 2 significant figures

Answer 1

The answer is 1.2Kg

Step-by-step explanation:

K.E=1/2mv²

103=1/2×m×13.1²

206=171.61m

divide both sides by 171.61

171.61/171.61=206/171.61

m=1.2Kg