Question

What is the work to be done to increase the velocity of the car from 10 m/s to 20 m/s

if the mass of the car is 1000 kg?​

Answer 1

$\large{\implies{Answer}}$

✏ Applying work energy theorem :

$w = \frac{1}{2} m2 \times v {}^{2} 2 - \frac{1}{2} m1 \times v {1}^{2} \\ w = \frac{1}{2} \times 1000kg \times (20) {}^{2} - \frac{1}{2} \times 1000 \times (10) {}^{2} \\ w = 1000 \times 200 - 1000 \times 50 \\ w = 200000 - 50000 \\ work \: done = 150000j$