Question

An object of 40 kg mass is moving with velocity 2m/s. A force applied on it increases to 5m/s.Find the work done by force​

Answer 1

Answer:

$\boxed{\text{Answer: Work Done = 60J}}$

Explanation:

$\text{According to Work - Energy Theorum:}\\\\\boxed{\text{Work done on a body = Increase in its KE}}\\\\KE1 = \frac{1}{2}mv^{2}\\ \\\text{= 1/2 x 40 x 2 = 40J}\\\\\\KE2 = \frac{1}{2}mv^{2}\\ \\\text{= 1/2 x 40 x 5 = 100J}\\\\\text{Therefore, Work Done = 100J - 40J = 60J}\\\\\boxed{\text{Answer: Work Done = 60J}}$

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