NEET Physics Chapter Wise Mock Test – Laws of Motion

 NEET Physics Chapter Wise Mock Test – Laws of Motion

Question 1:
What determines the nature of the path followed by the particle?
(a) Speed
(b) Velocity
(c) Acceleration
(d) Both (b) and (c)

Question 2:
A ship of mass 3 x 10⁷ kg initially at rest is pulled by a force of 5 x 10⁴ N through a distance of 3 m. Assume that the resistance due to water is negligible, the speed of the ship is
(a) 1.5 ms^-1
(b) 60 ms^-1
(c) 0.1 ms^-1
(d) 5 ms^-1

Question 3:
An open knife edge of mass 200 g is dropped from height 5m, on a cardboard. If the knife edge penetrates distance 2 m into the cardboard, the average resistance offered by the cardboard to the knife edge is
(a) 7 N
(b) 25 N
(c) 35 N
(d) None of these

Question 4:
A body with mass 5 kg is acted upon by a force F = (-3i + 4j) N. If its initial velocity at t= 0 is v = (6i-12j) m/s. The time at which it will just have a velocity along the y-axis is
(a) never
(b) 10 s
(c) 2 s
(d) 15 s

Question 5:

Question 6:
A machine gun fires 10 bullets/s, each of mass 10 g, the speed of each bullet is 20 cms^-1, then force of recoil is
(a) 200 dyne
(b) 2000 dyne
(c) 20 dyne
(d) None of these

Question 7:

Question 8:
A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the ground are respectively
(a) g,g
(b) g-a,g-a
(c) g-a,g
(d) a,g

Question 9:

Question 10:
A disc of mass 100 g is kept floating horizontally in air by firing bullets, each of mass 5g with the same velocity at the same rate of 10 bullets/s. The bullets rebound with the same speed in opposite direction, the velocity of each bullet at the time of impact is
(a) 196 cms^-1
(b) 9.8 cms^-1
(c) 98 cms^-1
(d) 980 cms^-1

Question 11:

Question 12:
A body of mass 2 kg travels according to the law x(t) = pt + qt² + rt³, where p = 3 m/s, q = 4 m/s² and r = 5m/s³The force acting on the body at t = 2 s is
(a) 136 N
(b) 134 N
(c) 158 N
(d) 68 N

Question 13:
The ratio of the weight of a man in a stationary lift and when it is moving downwards with uniform acceleration a is 3:2, then the value of a is
(a) 3g/2
(b) g/3
(c) g
(d) 2/3 g

Question 14:

Question 15:
Two blocks of masses m₁=4 kg and m₂ =2 kg are connected to the ends of a string which passes over a massless, frictionless pulley. The total downward thrust on the pulley is nearly
(a) 27 N
(b) 54 N
(c) 2.7 N
(d) None of these

Question 16:

Question 17:

Question 18:
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5 ms^-2, the reading of the spring balance will be
(a) 24 N
(b) 74 N
(c) 15N
(d) 49 N

Question 19:

Question 20:

Question 21:
A boat of mass 40 kg is at rest. A dog of mass 4 kg moves in the boat with a velocity of 10 ms^-1. What is the velocity of boat?
(a) 4 ms^-1
(b) 2 ms^-1
(c) 8 ms^-1
(d) 1 ms^-1

Question 22:

Question 23:

Question 24:
A block of mass 4kg is kept on a rough horizontal surface. The coefficient of static friction is 0.8. If a force of 19 N is applied on the block parallel to the floor, then the force of friction between the block and floor is
(a) 32 N
(b) 18 N
(c) 19 N
(d) 9.8 N

Question 25:
The minimum velocity (in ms^-1) with which a car driver must traverse a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding is
(a) 60 ms^-1
(b) 30 ms^-1
(c) 15 ms^-1
(d) 25 ms^-1

Question 26:

Question 27:
A heavy uniform chain lies on a horizontal top of table. If the coefficient of friction between the chain and the table is 0.25, then the maximum percentage of the length of the chain that can hang over one edge of the table is
(a) 20%
(b) 25%
(c) 35%
(d) 15%

Question 28:
A block is moving up an inclined plane of inclination 60° with velocity of 20 ms^-1 and stops after 2.00 s. If g = 10 ms^-2, then the approximate value of coefficient of friction is
(a) 3
(b) 3.3
(c) 0.27
(d) 0.33

Question 29:

Directions (Q. Nos. 30-36) In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion
(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
(c) If Assertion is true but Reason is false
(d) If both Assertion and Reason are false

Question 30:
Assertion (A): The acceleration of body sliding down a smooth plane of inclination 30° is 5 ms-2.
Reason (R): Acceleration is given by a = μ_g sinθ.

Question 31:
Assertion (A):  When a ball of mass m hits normally a wall with a velocity v and rebounds with same                                     velocity v, impulse imparted to the ball is 2 mv.
Reason (R): Impulse = change in linear momentum.

Question 32:
Assertion (A): Use of ball bearings between two moving parts of machine is a common practice.
Reason (R): Ball bearings reduce vibrations and provide good stability.

Question 33:
Assertion (A):  A rocket in flight is a system of varying mass.
Reason (R):  The rocket fuel is being consumed continuously.

Question 34:
Assertion (A): Frictional forces are conservative forces.
Reason (R): Potential energy can be associated with frictional forces.

Question 35:
Assertion (A) : A frame of reference which is moving with uniform velocity is non-inertial frame of reference.
Reason (R): A reference frame in which Newton’s laws of motion are applicable is non-inertial.

Question 36:
Assertion (A):  A table cloth can be pulled from a table without dislodging the dishes.
Reason (R): To every action there is an equal and opposite reaction.

Question 37:

Question 38:

Question 39:

Question 40:

Question 41:

Question 42:

Question 43:

Question 44:

Question 45:
A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 s. Then, the coefficient of friction is
(a) 0.01
(b) 0.02
(c) 0.03
(d) 0.06

Question 46:
A body of mass 0.25 kg is projected with muzzle velocity 100 m/s from a tank of mass 100 kg. What is the recoil velocity of the tank?
(a) 5 m/s
(b) 25 m/s
(c) 0.5 m/s
(d) 0.25 m/s

Question 47:
You are marooned on a frictionless horizontal plane and cannot exert any horizontal force by pushing against the surface. How can you get off
(a) by jumping
(b) by rolling your body on the surface
(c) by splitting or sneezing or throwing any object
(d) by throwing an object in opposite direction

Question 48:

Question 49:
With what minimum acceleration can a fireman slide down a rope while breaking strength of the rope is 2/3 of the Weight?
(a) 2g/3
(b) g
(c) g/3
(d) Zero

Direction (Q. Nos. 50-51) In each of the following questions, a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion
(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
(c) If Assertion is true but Reason is false
(d) If both Assertion and Reason are false

Question 50:
Assertion (A): Thrust on a rocket depends not only on the rate of decrease of mass.
Reason (R): Thrust also depends upon exhaust speed of the gases.

Question 51:
Assertion (A): When a body accelerates down an incline rolling purely, static friction force acts on the body.
Reason (R):  Point of contact of the body with incline remains at rest.

Question 52:

Question 53:
A spring balance is attached to the ceiling of lift. A man hangs his bag on the string and the balance reads 49 N, when the lift is stationary. If the lift moves downwards with an acceleration of 5 ms^-2. The reading of the spring balance would be
(a) 24 N
(b) 74 N
(c) 15 N
(d) 49 N

Question 54:

Question 55:
A ball moving with velocity 2 ms^-1 collides head-on with another stationary ball of double the mass. If the coefficient of restitution is Q.5, then their velocities (in ms^-1) after collision will be
(a) 0,1
(b) 1,1
(c) 1, 0.5
(d) 0, 2

Answers:

Hints And Solutions:

PhysicsChemistryBiology