An external force is always required to brake the inertia of a body which is either in the state of rest or state of uniform motion. Can all forces produce acceleration? Why?

An external force is always required to break the inertia of a body which is either in the state of rest or state of uniform motion. Which law governs this statement?

An external force is always required to brake the inertia of a body which is either in the state of rest or state of uniform motion. A boy holding a spring balance in his hand suspend a mass 2kg from it. If the balance slips from his hand and falls down, find the reading of the balance while it is in the air.

Elasticity is the property of a body by which it regains its original state on the removal of the deforming force. Why Steel is more elastic than Rubber?

There is always an excess of pressure inside drops and bubbles. State true or false: "A drop of liquid under no external forces is always spherical in shape."

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: work done by an applied force on a body moving on a rough horizontal plane with uniform velocity.

Weight of a body is the force of gravitational attraction experienced by it. It is equal to the product of mass of the body and acceleration due to gravity. If you imagine the motion of a body from the centre of the earth to the surface of the moon,what changes will you observe in the weight of the body during that motion?(Neglect the effect of all other objects).

The acceleration of a body due to the force exerted by earth on it is known as acceleration due to gravity. Why does earth impart same acceleration on all bodies?