Explain why(a) a horse cannot pull a cart and run in empty space,(b) passengers are thrown forward from their seats when a speeding bus stops suddenly,(c) it is easier to pull a lawn mower than...
A) For pulling a cart or for running, the horse pushes the earth with its feet and reaction of the earth makes it move in the forward direction. Since in empty space there is no reaction force, therefore the horse cannot run in empty space.
B) Due to inertia of motion.
C)While pulling a lawn mower, a force at an angle is applied on it, as shown in the given figure.
The vertical component of this applied force acts upward. This reduces the effective weight of the mower.
On the other hand, while...
