A body of mass 5 kg falls from a height of 10 m to 4m. Calculate:
(i) the loss in potential energy of the body, and (ii) the total energy possessed by the body at any instant? (Take g=10 m s−2).
Find the number from each of the following expanded forms:
(a) 8 × 104 + 6 × 103 + 0 × 102 + 4 × 101 + 5 × 100
(b) 4 × 105 + 5 × 103 + 3 × 102 + 2 × 100
(c) 3 × 104 + 7 × 102 + 5 × 100
(d) 9 × 105 + 2 × 102 + 3 × 101