Refer to JEE Physics Laws Of Motion MCQs Set A provided below available for download in Pdf. The MCQ Questions for Full Syllabus Physics with answers are aligned as per the latest syllabus and exam pattern suggested by JEE (Main), NCERT and KVS. Multiple Choice Questions for Laws Of Motion are an important part of exams for Full Syllabus Physics and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for JEE (Main) Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Laws Of Motion
Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Laws Of Motion in Full Syllabus.
Laws Of Motion MCQ Questions Full Syllabus Physics with Answers
Question: An athlete does not come to rest immediately after crossing the winning line due to the
- a) Inertia of motion
- b) Inertia of rest
- c) Inertia of direction
- d) None of these
Answer: Inertia of motion
Question: When an object is at rest
- a) A large number of forces may be acting on it which balance each other
- b) It is in vacuum
- c) No force is acting on it
- d) Force is required to keep it in rest state
Answer: A large number of forces may be acting on it which balance each other
Question: Newton’s first law is applicable
- a) Only in inertial reference frames
- b) In all reference frames
- c) Only in non-inertial reference frames
- d) None of these
Answer: Only in inertial reference frames
Question: From Newton’s second law of motion, it can be inferred that
- a) All of these
- b) No force is required to move a body uniformly along straight line
- c) Accelerated motion is always due to an external force
- d) Inertial mass of a body is equal to force required per unit acceleration in the body
Answer: All of these
Question: If a force of constant magnitude acts in direction perpendicular to the motion of a particle, then its
- a) Speed is uniform
- b) Momentum is uniform
- c) Velocity is uniform
- d) All of these
Answer: Speed is uniform
Question: When an object is in equilibrium state, then
- a) Its net acceleration must be zero
- b) It must be at rest
- c) No force is acting on it
- d) All of these
Answer: Its net acceleration must be zero
Question: When a force of constant magnitude and a fixed direction acts on a moving object, then its path is
- a) Either (2) or (3)
- b) Straight line
- c) Parabolic
- d) None of these
Answer: Either (2) or (3)
Question: A body of mass 2 kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table. The force required to keep the body moving with the same velocity is
- a) 0 N
- b) 2 × 104 N
- c) 8 N
- d) None of these
Answer: 0 N
Question: A 10 g bullet moving at 200 m/s stops after penetrating 5 cm of wooden plank. The average force exerted on the bullet will be
- a) –4000 N
- b) 4000 N
- c) –2000 N
- d) 2000 N
Answer: –4000 N
Question: A ball of mass 50 g is dropped from a height of 20 m. A boy on the ground hits the ball vertically upwardsb with a bat with an average force of 200 N, so that it attains a vertical height of 45 m. The time for which the ball remains in contact with the bat is [Take g = 10 m/s2]
- a) 1/80th of a second
- b) 1/120th of a second
- c) 1/40th of a second
- d) 1/20th of a second
Answer: 1/80th of a second
Question: A string tied on a roof can bear a maximum tension of 50 kg wt. The minimum acceleration that can be acquired by a man of 98 kg to descend will be [Take g = 9.8 m/s2]
- a) 4.8 m/s2
- b) 5 m/s2
- c) 4.9 m/s2
- d) 9.8 m/s2
Answer: 4.8 m/s2
Question: In the following figure, the object of mass m is held at rest by a horizontal force as shown. The force exerted by the string on the block is
- a)
- b)
- c) mg
- d)
Answer:
Question: In accordance with Newton’s third law of motion
- a) All of these
- b) This law is applicable whether the bodies are at rest or they are in motion
- c) For appearance of action and reaction, physical contact is not necessary
- d) Action and reaction never balance each other
Answer: All of these
Question:
- a) 300
- b) 3000
- c) 120
- d) Zero
Answer: 300
Question: A man of mass 50 kg carries a bag of weight 40 N on his shoulder. The force with which the floor pushes up his feet will be
- a) 530 N
- b) 882 N
- c) 90 N
- d) 600 N
Answer: 530 N
Question:
- a)
- b) None of this
- c)
- d)
Answer:
Question: In which of the following graphs, the total change in momentum is zero?
- a)
- b)
- c)
- d) None of this
Answer:
Question: weight Mg is suspended from the middle of a rope whose ends are at the same level. The rope is no longer horizontal. The minimum tension required to completely straighten the rope is
- a) Infinitely large
- b)
- c)
- d)
Answer: Infinitely large
Question: Two masses of 10 kg and 20 kg respectively are connected by a massless spring as shown in fig. A force of 200 N acts on the 20 kg mass. At the instant shown the 10 kg mass has acceleration 12 m/s2 towards right. The acceleration of 20 kg mass at this instant is
- a) 4 m/s2
- b) 10 m/s2
- c) 12 m/s2
- d) Zero
Answer: 4 m/s2
Question:
- a) 1580 N
- b) 1620 N
- c) 1360 N
- d) 760 N
Answer: 1580 N
More Questions........................................
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a) 96 N, 56 N
- b) 56 N, 96 N
- c) 48 N, 28 N
- d) 28 N, 48 N
Answer: 96 N, 56 N
Question:
- a)
- b) 0
- c) g
- d) 2g
Answer:
Question: A uniform rope of mass M and length L is fixed at its upper end vertically from a rigid support. Then the tension in the rope at the distance l from the rigid support isx
- a)
- b)
- c)
- d) None of this
Answer:
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c)
- d)
Answer:
Question: Figure shows a uniform rod of length 30 cm having a mass 3.0 kg. The rod is pulled by constant forces of 20 N and 32 N as shown. Find the force exerted by 20 cm part of the rod on the 10 cm part (all surfaces are smooth) is
- a) 24 N
- b) 64 N
- c) 12 N
- d) 36 N
Answer: 24 N
Question:
- a)
- b)
- c)
- d)
Answer:
Question: In a rocket, fuel burns at the rate of 2 kg/s. This fuel gets ejected from the rocket with a velocity of 80 km/s. Force exerted on the rocket is
- a) 1,60,000 N
- b) 1600 N
- c) 16 N
- d) 16,000 N
Answer: 1,60,000 N
Question:
- a) 100 N
- b)
- c) 50 N
- d)
Answer: 100 N
Question: A machine gun fires a bullet of mass 65 g with a velocity of 1300 m/s. The man holding it can exert a maximum force of 169 N on the gun. The number of bullets he can fire per second will be
- a) 2
- b) 1
- c) 3
- d) 4
Answer: 2
Question: A bullet of mass 40 g is fired from a gun of mass 10 kg. If velocity of bullet is 400 m/s, then the recoil velocity of the gun will be
- a) 1.6 m/s opposite to the direction of bullet
- b) 1.8 m/s opposite to the direction of bullet
- c) 1.6 m/s in the direction of bullet
- d) 1.8 m/s in the direction of bullet
Answer: 1.6 m/s opposite to the direction of bullet
Question: A cracker rocket is ejecting gases at a rate of 0.05 kg/s with a velocity 400 m/s. The accelerating force on the rocket is
- a) 20 N
- b) 20 dyne
- c) 200 N
- d) Zero
Answer: 20 N
Question: A rocket of mass 5700 kg ejects mass at a constant rate of 15 kg/s with constant speed of 12 km/s. The acceleration of the rocket 1 minute after the blast is (g = 10 m/s2)
- a) 27.5 m/s2
- b) 34.9 m/s2
- c) 3.50 m/s2
- d) 13.5 m/s2
Answer: 27.5 m/s2
Question: A balloon has 2 g of air. A small hole is pierced into it. The air comes out with a velocity of 4 m/s. If the balloon shrinks completely in 2.5 s. The average force acting on the balloon is
- a) 0.0032 N
- b) 0.008 N
- c) 8 N
- d) 3.2 N
Answer: 0.0032 N
Question: If n balls hit elastically and normally on a surface per unit time and all balls of mass m are moving with same velocity u, then force on surface is
- a)
- b)
- c)
- d) None of this
Answer:
Question:
- a)
- b)
- c)
- d) None of this
Answer:
Question: A bomb of mass 1 kg initially at rest, explodes and breaks into three fragments of masses in the ratio 1 : 1 : 3. The two pieces of equal mass fly off perpendicular to each other with a speed 15 m/s each. The speed of heavier fragment is
- a)
- b) 45 m/s
- c) 15 m/s
- d) 5 m/s
Answer:
Question: A 6 kg bomb at rest explodes into three equal pieces P, Q and R. If P flies with speed 30 m/s and Q withspeed 40 m/s making an angle 90° with the direction of P. The angle between the direction of motion of P and R is about
- a) 127°
- b) 120°
- c) 150°
- d) 143°
Answer: 127°
Question: A particle of mass 2m moving with velocity v strikes a stationary particle of mass 3m and sticks to it. The speed of the system will be
- a) 0.4v
- b) 0.6v
- c) 0.2v
- d) 0.8v
Answer: 0.4v
Question: Which of the following is self-adjusting force?
- a) Static friction
- b) Limiting friction
- c) Kinetic friction
- d) Rolling friction
Answer: Static friction
Question: Maximum force of friction is called
- a) Limiting friction
- b) Static friction
- c) Sliding friction
- d) Rolling friction
Answer: Limiting friction
Question: The limiting friction between two bodies in contact is independent of
- a) The area of surfaces in contact
- b) The materials of the bodies
- c) Nature of the surface in contact
- d) Normal reaction between the surfaces
Answer: The area of surfaces in contact
Question: It is difficult to move a cycle with brakes on because
- a) Sliding friction is more than the rolling friction
- b) Sliding friction opposes motion on road
- c) Rolling friction opposes motion on road
- d) Rolling friction is more than sliding friction
Answer: Sliding friction is more than the rolling friction
Question: Which is a suitable method to decrease friction?
- a) All of these
- b) Ball bearing
- c) Lubrication
- d) Polishing
Answer: All of these
Question:
- a) 60°
- b) 75°
- c) 45°
- d) 30°
Answer: 60°
Question:
- a)
- b)
- c)
- d) None of this
Answer:
Question: A child weighing 25 kg slides down a rope hanging from a branch of a tall tree. If the force of friction acting against him is 200 N, the acceleration of child is (g = 10 m/s2)
- a) 2 m/s2
- b) 5 m/s2
- c) 8 m/s2
- d) 22.5 m/s2
Answer: 2 m/s2
Question: An object of mass 1 kg moving on a horizontal surface with initial velocity 8 m/s comes to rest after 10s. If one wants to keep the object moving on the same surface with velocity 8 m/s the force required is
- a) 0.8 N
- b) 1.2 N
- c) Zero
- d) 0.4 N
Answer: 0.8 N
Question: A heavy box is solid across a rough floor with an initial speed of 4 m/s. It stops moving after 8 seconds. If the average resisting force of friction is 10 N, the mass of the box (in kg) is
- a) 20
- b) 40
- c) 5
- d) 2.5
Answer: 20
Question: If a block moving up an inclined plane at 30° with a velocity of 5 m/s, stops after 0.5 s, then coefficient of friction will be nearly
- a) 0.6
- b) 0.5
- c) 0.9
- d) 1.1
Answer: 0.6
Question: A metallic chain 1m long lies on a horizontal surface of a table. The chain starts sliding on the table if 25 cm (or more of it) hangs over the edge of a table. The correct value of the coefficient of friction between the table and the chain is
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c)
- d) None of this
Answer:
Question:
- a) 2 N
- b) 20 N
- c) 100 N
- d) 50 N
Answer: 2 N
Question:
- a) 4 kg
- b) 5 kg
- c) 3 kg
- d) 2 kg
Answer: 4 kg
Question: Two blocks A and B of masses 5 kg and 3 kg respectively rest on a smooth horizontal surface with B overA. The coefficient of friction between A and B is 0.5. The maximum horizontal force (in kg wt.) that can be applied to A, so that there will be motion of A and B without relative slipping, is
- a) 4
- b) 5
- c) 2.5
- d) 1.5
Answer: 4
Question: small metallic sphere of mass m is suspended from the ceiling of a car accelerating on a horizontal road with constant acceleration a. The tension in the string attached with metallic sphere is
- a)
- b)
- c)
- d)
Answer:
Question:
- a) 60°
- b) 75°
- c) 45°
- d) 35°
Answer: 60°
Question: A bus turns a slippery road having coefficient of friction of 0.5 with a speed of 10 m/s. The minimum radius of the arc in which bus turns is [Take g = 10 m/s2]
- a) 20 m
- b) 15 m
- c) 10 m
- d) 4 m
Answer: 20 m
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MCQs for Laws Of Motion Physics Full Syllabus
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