Tag: physics

Whenever an external force acts on a body there is a change in motion of the body. 

Luggage kept on the roof of a bus has the tendency to maintain its state of rest when bus is in rest and to maintain the state of motion when bus is in motion according to Newtons First Law of Motion. When bus will come in motion from its state of rest, in order to maintain the position of rest, luggage kept over its roof may fall down(backward). Similarly, when a moving bus will come in the state of rest or there is any sudden change in velocity because of applying of brake, luggage may fall down(forward) because of its tendency to remain in the state of motion.
This is the cause that it is advised to tie any luggage kept on the roof a bus with a rope so that luggage can be prevented from falling down.

The horse tied to cart is standing stationary on road denotes that the net force acting on the horse as well as the cart individually is zero. If it is standing stationary, it means that horse is applying force on the road perpendicularly and road is also applying same magnitude of force in the opposite direction, which makes the net force on horse to be zero and hence no forward force on the horse is there.

The table exerts a frictional force on the coin in the reverse direction and thus the coin stops across the table.

First Law of Newton states that when viewed in an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity unless acted upon by an external force.

Newton's first law of motion states that if an object experiences no net force, then its velocity is constant. So, force is not required to keep object moving with uniform velocity.

Newton's first law of motion states that the object tends to remain in the initial state untill no external force is applied to it which is also called Galileo's law of inertia.

For the body to be stationary, net external force acting on it must be equal to zero which is possible only when the combination of forces acting on it balance each other.

The dust particles get separated out from the carpet by beating it with a stick due to their inertia of rest which is explained by Newton's first law of motion.

Newton's first law of motion states that the body tends to remain in the initial state if no external force is applied to it which gave the idea of inertia.