Question

A body of mass 2 kg falls freely through a height of 19.6 m. Find the momentum acquired by the
body.
a) 49.2 Ns
b) 19.2 Ns
c) 39.2 Ns d ) 29.2 Ns​

Answer 1

Answer:

its 39.2 N

Explanation:

p=mv

m=2kg

by applying 3rd eqn of motion

u=19.6

p=2×19.6= 39.2

Answer 2

Answer:

c) 39.2 Ns

Explanation:

momentum = mass * velocity

$v^{2} - u^{2} = 2as\\u = 0\\a = 9.8 ms^{-2}\\s = 19.6m\\v^{2} = 2 * 9.8 * 19.6\\v = \sqrt{2 * 10 *19.6}v = 19.6ms^{-1}$

momentum = 2 * 19.6

= 39.2 kg ms-1