Question

A car of mass 10 kg applies brakes at a rate 0.5 m/s2 over a distance of 5m. Calculate the work done by the car.​

Answer 1

Answer:

Work done = 25 J

Explanation:

First, find force.

Force = mass × acceleration

= ma

$= 10 \times \frac{5}{10}$

= 5 N.

Now, we know that work done = Force × Displacement

= 5 N × 5m = 25 J

Answer 2

Answer:

25 J

Explanation:

We have mass and acceleration.

F=ma

F= 10*0.5=5N

D=5 m

W=f.d

W=25j