(i) Power is defined as the rate of doing work or rate of transfer of energy. Its SI unit is watt.

(ii) Given m = 50 kg,

h = 40 x 15 cm = 600 cm = 6 m,

t = 8 s,

P =?

Using P = W / t = mgh / t

= 50 x 10 x 6/ 8 = 375 W.

(i) Power is defined as the rate of doing work or rate of transfer of energy. Its SI unit is watt.

(ii) Given m = 50 kg,

h = 40 x 15 cm = 600 cm = 6 m,

t = 8 s,

P =?

Using P = W / t = mgh / t

= 50 x 10 x 6/ 8 = 375 W.