Laws of Motion Class 11 MCQ With Answers for NEET. We covered all the Laws of Motion Class 11 MCQ With Answers for NEET in this post for free so that you can practice well for the exam.
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MCQ on Laws of Motion for NEET Students
The direction of the impulse is
(a) the same as that of the net force
(b) opposite to that of the net force
(c) the same as that of the final velocity
(d) the same as that of the initial velocity
A force of 10 N acts on a body of mass 20 kg for 10 seconds. Change in its momentum is
(a) 5 kgm/s
(b) 100 kg m/s
(c) 200 kg m/s
(d) 1000 kg m/s
Option b – 100 kg m/s
A machine gun of mass M fires n bullets per second. The mass and speed of each bullet are m and v respectively. The force exerted on the machine gun is
(a) zero
(b) mvn
(c) Mvn
(d) Mvn/m
Option b – mvn
A long jumper runs before jumping because he
(a) covers a greater distance
(b) maintains momentum conservation
(c) gains energy by running
(d) gains momentum
Option b – maintains momentum conservation
The resultant force of 5N and 10N cannot be
(a) 12 N
(b) 8N
(c) 4N
(d) 5N
Option c – 4N
(a) force
(b) impulse
(c) power
(d) kinetic energy
Option b – impulse
Which of the following groups of forces could be in equilibrium
(a) 3N, 4N, 5N
(b) 4N, 5N, 10N
(c) 30N, 40 N 80N
(d) 1 N, 3N, 5N
Option a – 3N, 4N, 5N
Which of the following statements about friction is true?
(a) Friction can be reduced to zero
(b) Frictional force cannot accelerate a body
(c) Frictional force is proportional to the area of contact between the two surfaces
(d) Kinetic friction is always greater than rolling friction
Option d – Kinetic friction is always greater than rolling friction
Which of the following is a self-adjusting force?
(a) Static friction
(b) Limiting friction
(c) Dynamic friction
(d) Sliding friction
Option a – Static friction
Pulling a roller is easier than pushing because
(a) when we pull a roller, the vertical component of the pulling force acts in the direction of the weight
(b) the vertical component of the pulling force acts in the opposite direction of the weight
(c) the force of friction is in the opposite direction
(d) it is possible in the case of roller only
Option b – the vertical component of the pulling force acts in the opposite direction of the weight
It is difficult to move a cycle with brakes on because
(a) rolling friction opposes the motion on the road
(b) sliding friction opposes the motion of the road
(c) rolling friction is more than sliding friction
(d) sliding friction is more than rolling friction
Option d – sliding friction is more than rolling friction
A car moving on a horizontal road may be thrown out of the road in taking a turn
(a) by the gravitational force
(b) due to the lack of proper centripetal force
(c) due to the rolling frictional force between the tyre and the road
(d) due to the reaction of the ground
Option b – due to the lack of proper centripetal force
By applying the force of one Newton, one can hold a body of mass
(a) 102 grams
(b) 102 kg
(c) 102 mg
(d) None of these
Option a – 102 grams
The effect of frictional force may be minimized by
(a) using a smooth object
(b) using a smooth plane
(c) providing a lubricant at the surface of the contact
(d) All of these
Option d – All of these
If an object is in a state of equilibrium
(a) it is at rest
(b) it is in motion at constant velocity
(c) it is in free fall
(d) maybe more than one of the above
Option d – maybe more than one of the above
If a boat is moving along at constant speed, it may be assumed that
(a) a net force is pushing it forward
(b) the sum of only vertical forces is zero
(c) the buoyant force is greater than the gravity
(d) the sum of all forces is zero
Option d – the sum of all forces is zero
If A and B are two objects with masses of 6 kg and 34 kg respectively, then
(a) A has more inertia than B
(b) B has more inertia than A
(c) A and B have the same inertia
(d) None of the two has inertia
Option b – B has more inertia than A
Which of the following statements is correct, when a person walks on a rough surface?
(a) The frictional force exerted by the surface keeps him moving
(b) The force which the man exerts on the floor keeps him moving
(c) The reaction of the force which the man exerts on the floor keeps him moving
(d) None of these
Option c – The reaction of the force which the man exerts on the floor keeps him moving
A reference frame attached to the earth cannot be an inertial frame because
(a) Earth is revolving around the sun
(b) Earth is rotating about its axis
(c) Newton’s laws are applicable in this frame
(d) both (a) and (b)
Option d – both (a) and (b)
China wares are wrapped in straw paper before packing. This is the application of concepts of
(a) impulse
(b) momentum
(c) acceleration
(d) force
Option a – impulse
The force of action and reaction
(a) must be of the same nature
(b) must be of different nature
(c) maybe of different nature
(d) may not have an equal magnitude
Option a – must be of the same nature
A body whose momentum is constant must have constant
(a) velocity
(b) force
(c) acceleration
(d) All of the above
Option b – force
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