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Laws Of Motion QUESTIONS AND ANSWERS

IIT JEE : Laws Of Motion QUESTIONS AND ANSWERS :: part2 : 11 to 15

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

11.Mark correct option or options.

Friction always opposes the motion of a body

Friction only opposes the relative motion between surfaces

Kinetic friction depends on the speed of body when the speed of body is less than 10 m/s

The coefficient of friction is always less than or equal to one

12.For the equilibrium of a body on an inclined plane of inclination 450, the coefficient of static friction will be:

greater than one

less than one

zero

less than zero

13.A block of mass M is suspended from the ceiling of a room through a metal chain of mass m. The ceiling pulls the chain upwards with forces

(m + M)g

zero

14.A body of mass 32 kg is suspended by a spring balance from the roof of a vertically operating lift and going downward from rest. At the instant the lift has covered 20 m and 50 m, the spring balance showed 30 kg and 36 kg respectively. Then the velocity of the lift is

increasing at 20 m and increasing at 50 m

increasing at 20 m and decreasing at 50 m

continuously decreasing at a steady rate throughout the journey.

constantly increasing at constant rate throughout the journey.

15.A block of mass 10 kg is suspended through two light springs which are balanced as shown in the figure. Then:

both the scales will read 10 kg

both the scales will read 5 kg

the upper scale will read 10 kg and the lower zero

the readings may be of any value but their sum will be 10 kg

More Laws Of Motion QUESTIONS AND ANSWERS available in next pages