The force required to start an object sliding across a uniform horizontal surface is larger than the force required to keep the object sliding at a constant velocity once it starts.
The magnitudes of the required forces are different in these situations because the force of kinetic friction is less than the force of static friction. <em>(d)</em>
yes they would float cause of the weight of the ball
The earths crust starts the beginging of growth of land and plants while the earths mantle is deeper and has no life living on top of it
Work done=mgh
W=force*height
W=5N*0.50mts
W=2.5joule