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CHHANDAK SIR PHYSICS CLASSES
CODE-ADM/CSPC1
1. The relation between the displacement and the time for a body is t=√𝑥 + 3. If the velocity of the body is 0 then the
displacement is,
(a) 2m
(b) 4m
(c) 0
(d) None of these.
2. A motorcar is covering a path with a velocity of 80km/h in half time and the rest with a velocity 40km/h in another half time.
The total distance is covered by the car is 60km then the average velocity is
(a) 60km/h
(b) 80km/h
(c) 120km/h
(d) 180km/h
3. A body is falling freely from H height and it hits to a inclined plane at a height of h. For this collision the direction of the
velocity of the body is changed and it becomes parallel. What will be the value of (h/H) fo the particle to reach the ground in
maximum time?
1
1
1
2
(a)
(b)
(c)
(d)
2
3
4
3
4. A ball is falling freely from a height of 10m. It stops at a distance of 1m in the sand. For this which of the following is true?
(a) The momentum is conserved only.
(b) The kinetic energy is conserved.
(c) Both momentum and kinetic energy is conserved.
(d) None of these.
5. A ball with a speed of 5m/s is collide with a same ball which is in rest. For this collision the first ball becomes in rest and the
second ball moves towards with a velocity
(a) 10m/s
(b) 5m/s
(c) 2.5m/s
(d) 1m /s
6. A body is moving on the earth surface with a velocity of 14m/s and it stops at a distance of 50m due to the friction. Find out
the coefficient of friction between the earth surface and the body. Consider g=9.8m/s 2.
(a) 0.1
(b) 0.05
(c) 0.3
( d)0.2
7. A block of mass 2kg is at rest on an inclined plane which is inclined at angle of 300. The coefficient of static friction in
between the block and then plane is 0.7. The force of friction acting on the block is
(a) 9.8N
(b) 0.7 x 9.8 x √3N
(c) 98√3N
(d) 0.7 x 9.8N
8. The length of a string of a pendulum is 50cm and the mass of the pendulum is 4gm. By pulling the string it is made parallel
and then it releases. When the string makes an angle of 60 0 with the normal the kinetic energy of the pendulum is
(a) 9.8 x 104 erg
(b) 10 x 10 4 erg
(c) 9 x 10 4 erg
(d) 11 x 10 4 erg
9. A person of weight 100poundal takes 5mins to climb a 300ft tall monument. The horse power of the person is
(a) 0.2HP
(b) 0.35HP
(c) 0.18HP
(d) 0.5HP
10. A pump sucks 110poundle water per second from water reserver which is in the depth of 7ft from the ground. The water
hits a wall at height of 25ft at a speed of 16ft/s. Find out the power of the pump.(g=32ft/s 2)
(a) 7.00HP
(b) 7.5HP
(c) 8.2HP
(d)7.2HP
11.A block moving on a surface with velocity 20m/s comes to rest because of friction over a distance of 40m. The coefficient of
dynamic friction is(g=10m/s2)
(a) 0.1
(b) 0.2
(c) 0.3
(d) 0.5
12. A bullet of mass 15gm hits a wooden block of mass 3kg which is hanging by a long string. The bullet stuck in the wooden
block after hits it. For this hitting the block moves up by a distance 10m. The velocity of the bullet is,
(a) 251m/s
(b) 271m/s
(c) 281m/s
(d) 261m/s
13. A force F = (7- 2x – 3x2) is acting on a body of mass 2kg. For this the body displaced from x= 0 to x=5m. The work done is,
(a) 35J
(b) -70J
(c) -115J
(d) 270J
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14. The principle on which the rocket motion is based on is
(a) mass
(b) kinetic energy
(c) linear momentum
(d) angular momentum.
15. A force of 250N is applied on a body and for this the momentum of the body has increased by 125kg ms -1. The time at
which the force is acting on the force is
(a) 0.2 sec
(b) 0.5sec
(c) 0.4 sec
(d) 0. 25sec
16. A car start to move from rest and it moves at an acceleration of α for some time. After that the car moves in negative
acceleration β for some time and then comes to rest. If the time is t then the highest velocity of the car is
𝛼+𝛽
𝛼𝛽
𝛼
𝛽
(a) (
)t
(b) (
)t
(c) (
)t
(d) (
)t
𝛼𝛽
𝛼+𝛽
𝛼+𝛽
𝛼+𝛽
17. A ball is thrown horizontally with a velocity of 4m/s. After 0.7s the velocity of the ball is (g=10m/s).
(a) 11m/s
(b) 10m/s
(c) 8m/s
(d) 3m/ s
18. A block is moving down from an inclined plane with an acceleration of g/4. The inclination of the plane is 30 0. The
coefficient of kinetic friction is,
1
2
1
1
(a)
(b)
(c)
(d)
√3
√3
2√3
2
19. A man is sitting in a moving train facing the engine of the train. He tosses a coin and the coin falls behind him. From this
we can conclude that
(a) The train is moving towards with an increasing velocity.
(b) The train is moving towards with a decreasing velocity.
(c) The train is moving towards with a constant velocity.
(d ) The train is moving backward with a constant velocity.
20. Two bodies are projected by the angles 300 and 600 respectively with the horizontal. The ratio of the maximum height is
(a) 3:1
(b) 1:3
(c) 1:2
(d ) 2:1
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ANSWERS
1. (C)
2.(A)
3.(A)
4.(A)
5.(B)
6.(D)
7.(A)
8.(A)
9.(C)
10.(D)
11.(D)
12.(C)
13.(C)
14.(C)
15.(B)
16.(B)
17.(C)
18.(C)
19.(A)
20.(B)
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