EASY
11th Maharashtra Board
IMPORTANT
Earn 100

Consider the following pair of forces of equal magnitude and opposite directions:

(P) Gravitational forces exerted on each other by two-point masses separated by a distance.

(Q) A couple of forces used to rotate a water tap.

(R) Gravitational force and normal force experienced by an object kept on a table.

For which of these pair/pairs the two forces do NOT cancel each other's translational effect?

22.22% studentsanswered this correctly

Important Questions on Laws of Motion

EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 1

Consider following forces: (w) Force due to tension along a string, (x) Normal force given by a surface, (y) Force due to air resistance and (z) Buoyant force or upthrust given by a fluid. Which of these are electromagnetic forces?

EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 1
At a given instant three point masses m, 2m and 3m are equidistant from each other. Consider only the gravitational forces between them. Select correct statement/s for this instance only:
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 1
The rough surface of a horizontal table offers a definite maximum opposing force to initiate the motion of a block along the table, which is proportional to the resultant normal force given by the table. Forces F1 and F2 act at the same angle θ with the horizontal and both are just initiating the sliding motion of the block along the table. Force F1 is a pulling force while the force F2 is a pushing force. F2 > F 1 , because
MEDIUM
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 1
A mass 2m moving with some speed is directly approaching another mass m moving with double speed. After some time, they collide with coefficient of restitution 0.5. Ratio of their respective speeds after collision is
MEDIUM
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 1
A uniform rod of mass 2m is held horizontally by two sturdy, practically inextensible vertical strings tied at its ends. A boy of mass 3m hangs himself at one third length of the rod. Ratio of the tension in the string close to the boy to that in the other string is
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 1
Select WRONG statement about centre of mass:
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 1
For which of the following objects will the centre of mass NOT be at their geometrical centre?

(1) An egg

(2) a cylindrical box full of rice

(3) a cubical box containing assorted sweets 

EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 4 - Laws of Motion>Exercises>Q 2
In the following table, every entry on the left column can match with any number of entries on the right side. Pick up all those and write respectively against A, B, C and D
Sr.no Name of the force Sr.no Type of the force
A Force due to tension in a string P EM force
B Normal force Q Reaction force
C Frictional force R Conservative force
D Resistive force offered by air or water for objects moving through it S Non- conservative force.