What are Newton's 3 laws of motion?
First law: Unless acted upon by a force, a object either remains at rest or moves at a constant speed.Second Law: Force=Mass*AccelerationThird Law: For every action there is an equal and opposite reaction
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A boy (25kg) and a girl (20kg) are playing on a see-saw which is 4m long. If the boy sits 1m from the centre on the left side and the girl 2m from the centre on the other, which direction will the see-saw will rotate around its centre?
Why does a body engaged in uniform circular motion do no work?
An exo-planet orbits its local star, of mass 2.00x10^30kg, in a steady circular orbit of radius 8.00x10^8km. Calculate the orbital period of the star, in years.