1. When a bus suddenly takes a turn, the passengers are thrown outwards because of ?

A) Inertia of motion
B)Acceleration of motion
C) Speed of motion
D) Both (b) and (c)

…
Answer is A)

Show Answer

2. A person sitting in an open car moving at constant velocity throws a ball vertically up into air. The ball fall ?

A) Outside the car
B) In the car ahead of the person
C) In the car to the side of the person ^{2}
D) Exactly in the hand which threw it up ^{2}

…
Answer is D)

Show Answer

3. A train is moving with velocity 20 m/sec. on this, dust is falling at the rate of 50 kg/min. The extra force
required to move this train with constant velocity will be ?

A) 16.66 N
B) 1000 N
C) 166.6 N
D) 1200 N

…
Answer is A)

Show Answer

4. Two forces are such that the sum of their magnitudes is 18 N and their resultant is perpendicular to the
smaller force and magnitude of resultant is 12. Then the magnitudes of the forces are ?

A) 12 N, 6 N
B) 13 N, 5N v
C) 10 N, 8 N
D) 16 N, 2 N

…
Answer is B)

Show Answer

5. The resultant of two forces, one double the other in magnitude, is perpendicular to the smaller of the two
forces. The angle between the two forces is ?

A) 60 ^{0}
B) 120 ^{0}
C) 150 ^{0}
D) 90 ^{0}

…
Answer is B)

Show Answer

6. A weightless ladder, 20 ft long rests against a frictionless wall at an angle of 60o with the horizontal. A 150
pound man is 4 ft from the top of the ladder. A horizontal force is needed to prevent it from slipping.
Choose the correct magnitude from the following ?

A) 175 lb
B) 100 lb sec
C) 70 lb
D) 150 lb

…
Answer is C)

Show Answer

7. A cricket ball of mass 150 gm is moving with a velocity of 12 m/s and is hit by a bat so that the ball is
turned back with a velocity of 20 m/s. The force of blow acts for 0.01s on the ball. The average force
exerted by the bat on the ball is ?

A) 480 N
B) 600 N
C) 500 N
D) 400 N

…
Answer is A)

Show Answer

8. You are on a frictionless horizontal plane. How can you get off if no horizontal force is exerted by pushing
against the surface ?

A) By jumping
B) By splitting or sneezing
C) By rolling your body on the surface
D) By running on the plane

…
Answer is B)

Show Answer

9. A ball of mass 150g moving with an acceleration 2 20m / s is hit by a force, which acts on it for 0.1 sec. The
impulsive force is ?

A) 0.5 N-s
B) 0.1 N-s
C) 0.3 N-s
D) 1.2 N-s

…
Answer is C)

Show Answer

10. A force of 50 dynes is acted on a body of mass 5 g which is at rest for an interval of 3 seconds, then
impulse is ?

A) 0.15×10^{-3} N – s
B) 0.98×10^{-3} N – s
C) 1.5×10^{-3} N – s
D) 2.5×10^{-3} N – s