Question

1) a force of 5 newton acts on a body for 0.2 sec. the change in momentum of the body is what?
2) if a force of 1 newton acts on a mass of 500 gram. acceleration will be what?

Answer 1

Question#21125

1) a force of 5 newton acts on a body for 0.2 sec. the change in momentum of the body is what?

2) if a force of 1 newton acts on a mass of 500 gram. acceleration will be what?

Answer:

1)

Such as momentum is:

$$P = m v$$ $$v = a t$$

According to the second Newton's law:

$$a = \frac {F}{m}$$ $$P = m t \frac {F}{m}$$ $$P = t F$$ $$P = 0. 2 * 5 = 1 \sec^{-1}$$

2)

According to the second Newton's law:

$$a = \frac {F}{m}$$ $$a = \frac {1}{0 . 5} = 2 \, \mathrm{m/s^2}$$