Question

#1.

Which of the following statements is true according to

Newton’s first law of motion?

A) A net force is required to maintain an object at rest.

B) A net force is required to maintain an object’s constant velocity.

C) A net force is required to change an object’s velocity.

D) All of the above

#2.

The net work done on an object is equal to the change

in the object’s kinetic energy.

A) TRUE

B) FALSE

#3.

The net work done on an object is equal to the change

in the object’s kinetic energy.

A) TRUE

B) FALSE

Answer 1

(1) It's answer is option number C

A net force is required to change an object's velocity.

This is so because according to Newton's first law of motion an object always tries to maintain its previous state when no force is acting on it.

This is also called law of inertia.

(2) it's answer is True.

This is so because according to work energy theorem the

Work done= change in kinetic energy

(3) True

Because, according to work energy theorem

Work done= change in kinetic energy