'An unbalanced external force is needed to initiate the motion from state of rest but no unbalanced net force is needed to sustain the uniform motion.' Read the statement made by Galileo and justify

An external force is required to keep a body in uniform motion This statement was given by.

It is a common experience that to initiate motion in a body at rest, force required is much greater than the force required to maintain the motion. Read the above passage and answer the following question: (i) Do you agree with the statement? (ii) How do you justify the statement? (iii) What values of day to day life do you learn from this?

If only an external force can change the state of motion of CM of a body then how does the internal force of the brakes bring bicycle to rest?

(a)What is linear momentum of a heavy object at rest? (b)what force is required to maintain uniform motion of a body along a straight lline?

Which of the following statements are true? (i) An object will continue moving uniformly until the resultant force on it is zero. (ii) The bodies do not change their state of rest or motion unless acted upon by an unbalanced external force. (iii) If a body is at rest on the surface of the Earth, then the net downward Torce exer force exerted by the Earth and net upward force exerted on the body are not equal to each other.

If the net external force acting on a body is zero, then the body at rest continuesto remain at rest and a body in motion continues to move with uniform motion. What is the name given to this property of the body?

A body is imparted motion from rest to move in a straight line. If it is then obstructed by an opposite force, then

Assertion : An external force is required to keep a body in motion. Reason : If the net external force is zero, a body at rest continues to remain at rest and a body in motion continues to move with a uniform velocity.

State whether the following statement is true or false Unbalanced forces acting on a body change its shape.