Question

14) A force of 5 N changes the velocity of a moving body of mass 2 kg from 2 m's to 5 m/s in 10
seconds. Calculate the work done by the force on the object.​

Answer 1

Answer:

175J

Step-by-step explanation:

$v = u + at \\ = > 5 = 2 + a \times 10 \\ = > a = \frac{3}{10}m/{s}^{2}$

${v}^{2} = {u}^{2} + 2as \\ 25 = 4 + 2 \times \frac{3}{10} \times s \\ 21 = \frac{3}{5} \times s \\ s = 35m$

$Work \: done = F×s \\ = 5 \times 35 \\ = 175J$

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