(F) The direction of centripetal acceleration is always directed toward the cent

Question

(F) The direction of centripetal acceleration is always directed toward the center of the circle of motion.

True False

(G) What force provides centripetal acceleration to a ball attached to a string, rotating in a circular path at constant speed?

(a) Inertia of the ball (b) Tension in the string (c) air resistance

(H) If the angular acceleration and the angular velocity of a mass moving in a circle, are in opposite directions, the angular speed will -------- with time.

(a) Increase (b) decrease

(I) Centrifugal force on an object in a circular motion, is because of the -------------.

(a) Inertia of the object (b) Tension in the string (c) air resistance

Explanation / Answer

Here ,

F)

centripetal acceleration is always points towrds the centre of curvature of motion
hence , this is TRUE

G)

as the tension is the force that acts towards the centre and pulls the ball towards the centre

the correct option is b) Tension in the string

H)

as the angular speed is oposite direction to angular acceleration

the change in angular speed will be negative

and the correct option is

b)decrease

I)

Centrifugal force is a pseudoforce , which is included in a non inertial force to counter the centripetal force.

as the tension is the centripetal force , the centrifugal force acts due to b) Tension in the string

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