Question

a
17 What is the kinetic energy of a body of mass 1 kg moving
18. Is potential energy a vector or a scalar quantity ?
19. A load of 100 kg is pulled up by 5 m. Calculate the work done. (8 = 9.8 m/s2)
the following statement is true or false :​

Answer 1

Explanation:

17

$kinetic \: energy \: = \frac{1}{2} m {v}^{2}$

18 Potential energy is a scalar quantity. it has only magnitude but no direction. But in some cases we may consider it as either positive or negative. This does not mean that it has a direction

19

$workdone = force \times distance \\ 9.8 \times 100 \times 500\\ 980\times 500 \\ 4900j$

1m =100cm

5m= 500cm