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Force of friction is measured in:...

Force of friction is measured in:

A

Newton

B

Joule

C

Watt

D

Ohm

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When brakes are applied in a car,the brake-shoes apply frictional force on the wheels.these forces are internal for the system(car).For retardation,external forces ust act on the system.The force of friction at the road surface remains the same before and after teh brakes are applied (f = mu N) .How does the car stop?

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JBD PUBLICATION-Model Test Paper 13-EXERCISE
  1. Force of friction is measured in:

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  2. The collision between a bat and ball is ……………

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  3. velocity of a moving body can be zero.(yes/ No)

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  4. Give the location of the centre of mass of a :- ring.

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  5. What is force of vibration?

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  6. Explain one use of dimesional analysis by giving an example.

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  7. The resistance R = Vil. If V= (100 +- 5) volt and I = (10 +- 0.2) A. F...

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  8. If vecA = 2 hati + 3 hatj +hatk, vecB = 2 hati - 2hatj + 3 hatk, calcu...

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  9. A force of 100 N is able rp produce an acceleration 8 m s^-2 in body o...

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  10. Explain conservative force with examples.

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  11. The net external torque on a system of particles about an axis is zero...

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  12. What is geostationary satellite ?Write its two applications.

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  13. If a person stands nera a fast moving train, there is a possibility of...

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  14. When a projectile os projected at an angle with the horizontal, find t...

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  15. A body travels 200 m in 2 seconds and 220 m in the next 4 seconds. Wha...

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  16. Write an expression for the centripetal force.

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  17. What clastic and inclastic collisions? Give one example of each and st...

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  18. The velocity of a car is doubled. Find the ratio of percentage increas...

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  19. Define orbital velocity. How is it related with escape velocity?

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  20. Determine excess of pressure in side liquid drop

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