A 0.50 kg croquet ball is initially at rest on the grass. When the ball is

Physics

1 answer:

kramer3 years ago

5 0

Answer:

(a) 1.6 Ns

(b) 6.95ms

Explanation:

mass of ball, m = 0.5 kg

initial velocity, u = 0

force, F = 230 N

final speed, v = 3.2 m/s

(a) According to the formula of momentum

The change in momentum = m (v - u) = 0.5 (3.2 - 0) = 1.6 Ns

(b) According to the Newton's second law, the force acting on the ball is rate of change of momentum of ball. let the time is t.

$F =\frac{m(v-u)}{t}\\\\230 =\frac{1.6}{t}\\\\t =6.95\times 10^{-3} s = 6.95 ms$

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The force that contributed to the formation of planets, determines the motion of bodies in the solar system, and pulls objects t

kykrilka [37]

Answer:

The force of gravity

Explanation:

Gravity was studied, by early scientists such as Copernicus and others, Galileo was the first to ensure that planets moved according to a physical equation that depended on a force that caused celestial bodies to move and interact with each other. But years later Newton based on studies conducted deciphering what Galileo assumed, he was able to find the equation of the force of gravity in any body in the universe. This equation depends on the masses of the two interacting bodies, the distance between them and a constant, which I call universal gravitation constant.

$F_{g}=G*\frac{m_{1}*m_{2}}{r^2}$