How much work in joules must be done to stop a 920-kg car traveling at 90 km/h?

Work done, W = −287500 Joules

Explanation:

It is given that,

Mass of the car, m = 920 kg

The car is travelling at a speed of, u = 90 km/h = 25 m/s

We need to find the amount of work must be done to stop this car. The final velocity of the car, v = 0

Work done is also defined as the change in kinetic energy of an object i.e.

W = −287500 Joules

Negative sign shows the work done is done is opposite direction.

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the components of a vector are the parts of the vectors that are to each other.

b perpendicular