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# A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in t...

### Question

A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is

### Options

A) 1 . 25 x 104 W

B) 2 . 50 x 104 W

C) 1 . 25 x 106W

D) 2 . 50 x 106 W

### Explanation:

Power = Force x $$\frac{distance}{time}$$ = $$\frac{m(v - u)}{t} \times v$$

$$\frac{800(25 - 0)}{20} \times 25$$ = 2.5 x 10 4 watts

## Dicussion (1)

• Power = Force x $$\frac{distance}{time}$$ = $$\frac{m(v - u)}{t} \times v$$

$$\frac{800(25 - 0)}{20} \times 25$$ = 2.5 x 10 4 watts