Physics
guide, solved MCQ test series, objective questions for preparing NEET, IITJEE,
Joint Entrance Exams and other competitions.
Newton’s Laws of Motion and Friction (Topics):
Force and Inertia; Law of Inertia;
Newton’s First Law of Motion; Center of Mass; Momentum; Newton’s Second Law of
Motion; Impulse; Newton’s Third Law of Motion; Law of Conservation of Linear
Momentum and its applications; Variable Mass; Free Body Diagrams; Pulleys;
Equilibrium of Concurrent Forces; Constraint Equations; Pseudo Force; Static
and Kinetic Friction; Laws of Friction; Rolling Friction; Centripetal Force and
its applications; Impulse; Collision
Physics: Newton’s Laws of Motion and Friction
Multiple Choice Questions (MCQs) –
Set 2 (Q. No. (11-20)
Question 11:
Two masses are connected by a string which passes over a pulley accelerating
upward at a rate A as shown. If a1 and a2 be the
acceleration of bodies 1 and 2 respectively then:
Question 12:
The pendulum hanging from the ceiling of a railway carriage makes angle 300
with the vertical, when it is accelerating. The acceleration of the carriage
is:
Question 13:Two particles A and B, each of mass m, kept stationary by applying a horizontal force F = mg on particle B as shown in fig. Then –
a. Tan β = 2
tan α b. 2T1 = 5T2 c. T1 √2 = T2
√5 d. None of these
(1) a, b (2) b, c (3) c, d (4) a, c
Question 14:
Action and reaction –
a. Act on two
different objects
b. Have
opposite direction
c. Have equal
magnitude
d. All of
these
Question 15:
Two block A and B placed on a plane surface as shown in the figure. The mass of
block A is 100 kg and that of block B is 200 kg. Block A is tied to a stand and
block B is pulled by a force F. If the coefficient of friction between the
surfaces of A and B is 0.2 and the coefficient of friction between B and the
plane is 0.3 then for the motion of B the minimum value of F will be –
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Question 16:
If a block moving up an inclined plane at 300 with a velocity of 5
m/s, stops after 0.5 s, then, coefficient of friction will be nearly –
a. 0.5
b. 0.6
c. 0.9
d. 1.1
Question 17:
A fireman wants to slide down a rope. The breaking load for the rope is 3/4th
of the weight of the man. With what minimum acceleration should the fireman
slide down? Acceleration due to gravity is g.
Question 18:
A 13 m ladder is placed against a smooth vertical wall with its lower end 5 m
from the wall. What should be the maximum coefficient of friction between
ladder and floor, so that it remains in equilibrium?
a. 0.36
b. 0.72
c. 0.21
d. 0.52
Question 19:
A bird is sitting in an air tight cage. The cage is put on a weighing machine.
It reads W1. The bird now starts flying. The weighing machine reads
W2. Then:
a. W1<
W2
b. W2<
W1
c. W1
= W2
d. None
Question 20:
A body of mass M is kept on a rough horizontal surface (friction coefficient =
µ). A person is trying to pull the body by applying a horizontal force but the
body is not moving. The force by the surface on A is F where –
Newton's Laws of Motion and Friction - Physics Objective Questions, Test Series
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