First can someone help me apply Newton's third law of motion to explain how two billiard balls moving toward each other @ the same speed collide ans move away from each other @ the same speed.
And I need help calculating the acceleration of an 82 kg couch that is puched across the floor with an unbalanced force of 21 N
2007-02-21 00:18:10 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Newtons 3rd law is-:
Each action has an equal and opposite reaction. Therefore if the billiard balls are exactly the same mass and travel exactly the same speed - then they will recoil at the same speed also (neglecting the energy released as sound when the balls hit each other - and also a touch of heat.)
For the second question (ignoring frictional forces.)
F = m a (Newtons 2nd law)
a = F / m
a = 21 / 84 = 0.25 metres per second.
2007-02-21 00:28:36 · answer #1 · answered by Doctor Q 6 · 1⤊ 0⤋