Newton's Third Law of Motion applies to which of the following situations?
A. When a person jumps from the boat to the river, the boat goes backwards
B. Passengers standing in a bus fall in the back direction, when the stationary bus suddenly moves
C. When a person falls on the cement floor, he gets hurt
D. While catching a fast moving cricket ball, a fielder puts his hands backwards
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For every action there is an equal and opposite reaction. The law was given by
A. Isaac Newton
B. Albert Einstein
C. Niels Bohr
D. Duncan Haldane
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Newton's second law of motion:
A. Explains the relationship between forces on two mutually effective objects
B. Also known by the law of inertia
C. It is helpful to understand the effects of force
D. Also known by the law of conservation of energy
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When the car turns on a curved road, the passengers sitting in it feel a force on themselves in the opposite direction of the center, this force is due to . . . . . . . .
A. centrifugal force
B. inertia
C. centripetal force
D. gravitational force
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The speed of an ant is 75 cm/sec. The ant travels in a day is
A. 64800 m/day
B. 648000 m/day
C. 648000 cm/day
D. 64800000 cm/day
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The motion of a body around a circular path is an example of
A. uniform velocity, variable acceleration
B. uniform speed, uniform velocity
C. uniform speed, variable velocity
D. uniform speed, variable acceleration
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A 70 kg man pushes a 50 kg man with the force of 50N. How much force has a 50 kg man pushed the other person?
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The rate of change in momentum of a body is proportional to . . . . . . . .
A. Applied displacement
B. Applied force
C. Applied potential energy
D. Applied pressure
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Electrostatic force is
A. the force exerted by a charged body
B. the force exerted by the gravity
C. example of a contact force
D. None of the above
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Zero acceleration means . . . . . . . .
A. The velocity of the object is constant
B. The velocity of the object is low
C. The velocity of the object is zero
D. The velocity of the object increases
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Consider the following velocity and time graph.
Which one of the following is the value of average acceleration from 8 s' to 12 s?
A. 8 m/s2
B. 12 m/s2
C. 2 m/s2
D. - 1 m/s2
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The stock of books lying on the table does not move due to . . . . . . . .
A. inertia
B. speed
C. magnetism
D. gravity
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What will be the acceleration produced when a force of 21 N is applied on an object of mass 3 kg?
A. 0.007 ms-2
B. 0.7 ms-2
C. 7 ms-2
D. 70 ms-2
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When a stationary bus starts moving, the people standing in it fall in the back direction. Which of the following law explains this situation?
A. Newton's first law of motion
B. Newton's third law of motion
C. Newton's second law of motion
D. Law of momentum conservation
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What was the year of publication of Newton's laws of motion?
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Two persons are holding a rope of negligible mass horizontally. A 20 kg mass is attached to the rope at the mid-point, as a result, the rope deviates from the horizontal direction. The tension required to completely straighten the rope is (g = 10 m/s2 )
A. 200 N
B. 20 N
C. 10 N
D. infinitely large
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Which one of the following statements is not correct?
A. If the velocity and acceleration have opposite sign, then the object is slowing down
B. If the velocity is zero at an instant, then the acceleration should also be zero at that instant
C. If the velocity is zero for a time interval, then the acceleration is zero at any instant within the time interval
D. If the position and velocity have opposite sign, then the object is moving towards the origin
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In which of the following cases of motions, the distance and displacement are equal?
A. If the car is moving an straight road
B. If the car is moving in circular path
C. The pendulum is moving to and fro
D. The earth is revolving around the sun
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Which one of the following has maximum inertia?
A. An atom
B. A molecule
C. A one rupee coin
D. A cricket ball
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In the given Velocity (v) versus Time (t ) graph, accelerated and decelerated motions are respectively represented by line segments.
A. CD and BC
B. BC and AB
C. CD and AB
D. AB and CD
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