(1) : If a body moving in a circular path has a constant speed, then there is no force acting on it.
(2) : The direction of the velocity vector of a body moving in a circular path is changing.

Q. Choose the correct option from (A), (B),(C) & (D) STATEMENT-1 : If instantaneous velocity of a particle is zero, then it can have instantaneous acceleration. STATEMENT-2 : Acceleration acting on a particle is independent of instantaneous state of the body. A) Statement-1 is true, Statement-2 is true, Statement-2 is a correct explanation for Statement-1 B) Statement-1 is true, Statement-2 is true, Statement-2 is NOT a correct explanation for Statement-1 C)Statement-1 is true but Statement-2 is false D)Statement-1 is false but Statement-2 is true

Q.

Statement 1: Force acting on a body increases its kinetic energy from 200 J to 400 J and the force does a positive work on the body.

Statement 2: A force does a positive work on an object when the displacement due to the force is in the direction of the force itself.

Q. Assertion : A body is moved from $x=2$ to $x=1$, under a force $F=4x$, the work done by the force is negative.
Reason: Force and displacement are in opposite directions.

Q. Assertion: Average kinetic energy in one oscillation during $\text{SHM}$ of a body is $\frac{1}{4}m{\omega }^2{A}^2$.
Reason: Maximum kinetic energy is $\frac{1}{2}m{\omega }^2{A}^2$.

Q. Assertion (A) : Refractive index has no units.
Reason (R) : Refractive index is ratio of two similar quantities.

Select the correct option: [1 Mark]
1) Both A and R are true and R is the correct explanation of A.
2) Both A and R are true and R is not the correct explanation of A.
3) A is true but R is false.
4) A is False but R is true.