A car of mass 800kg attains a speed of 25m/..

Question 1 Report

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

1 . 25 x 104 W

2 . 50 x 104 W

1 . 25 x 106W

2 . 50 x 106 W

Answer Details

Power = Force x $\frac{d i s t a n c e}{t i m e}$ = $\frac{m (v - u)}{t} \times v$

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