Question
Assertion : In circular motion, the centripetal and centrifugal force acting in opposite direction balance each other.
Reason : Centripetal and centrifugal forces don't act at the same time.

Answer

(d) While moving along a circle, the body has a constant tendency to regain its natural straight line path.This tendency gives rise to a force called centrifugal force. The centrifugal force does not act on the body in motion, the only force acting on the body in motion is centripetal force. The centrifugal force acts on the source of centripetal force to displace it radially outward from centre of the path.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Assertion : The temperature coefficient of resistance is positive for metals and negative for P-type semiconductor.
Reason : The effective charge carriers in metals are negatively charged whereas in $P$-type semiconductor they are positively charged.
Assertion : The internal energy of an isothermal process does not change.
Reason : The internal energy of a system depends only on pressure of the system.
Assertion : The S.l. unit of thermal conductivity is watt $m K$
Reason : Thermal conductivity is a measure of ability of the material to allow the passage of heat through it.
Assertion : An induced emf is generated when magnet is withdrawn from the solenoid.
Reason : The relative motion between magnet and solenoid induces emf.
Assertion : Work done by friction on a body sliding down an inclined plane is positive.
Reason : Work done is greater than zero, if angle between force and displacement is acute or both are in same direction.
Assertion : In circular motion, work done by centripetal force is zero.
Reason : In circular motion centripetal force is perpendicular to the displacement.
Assertion : The induced e.m.f. and current will be same in two identical loops of copper and aluminium, when rotated with same speed in the same magnetic field.
Reason : Induced e.m.f. is proportional to rate of change of magnetic field while induced current depends on resistance of wire.
Assertion : Through the same current flows through the line wires and the filament of the bulb but heat produced in the filament is much higher then that in line wires.
Reason : The filament of bulbs is made of a material of high resistance and high melting point.
Assertion : At o $K$ Germanium is a superconductor.
Reason : At $0 K$ Germanium offers zero resistance.
Assertion : Work and heat are two equivalent form of energy.
Reason : Work is the transfer of mechanical energy irrespective of temperature difference, whereas heat is the transfer of thermal energy because of temperature difference only.