JEE Main 2018 (Online) 15th April Morning Slot | Center of Mass and Collision Question 86 | Physics

JEE Main 2018 (Online) 15th April Morning Slot

MCQ (Single Correct Answer)

-1

A force of $$40$$ $$N$$ acts on a point $$B$$ at the end of an $$L$$-shaped object, as shown in the figure. The angle $$\theta $$ that will produce maximum moment of the force about point $$A$$ is given by :

JEE Main 2018 (Online) 15th April Morning Slot Physics - Center of Mass and Collision Question 87 English

JEE Main 2018 (Online) 15th April Morning Slot Physics - Center of Mass and Collision Question 87 English

$$\tan \theta = {1 \over 2}$$

$$\tan \theta = 2$$

$$\tan \theta = 4$$

$$\tan \theta = {1 \over 4}$$

JEE Main 2015 (Offline)

MCQ (Single Correct Answer)

-1

A particle of mass $$m$$ moving in the $$x$$ direction with speed $$2v$$ is hit by another particle of mass $$2m$$ moving in the $$y$$ direction with speed $$v.$$ If the collision is perfectly inelastic, the percentage loss in the energy during the collision is close to:

$$56\% $$

$$62\% $$

$$44\% $$

$$50\% $$

JEE Main 2013 (Offline)

MCQ (Single Correct Answer)

-1

This question has statement $${\rm I}$$ and statement $${\rm I}$$$${\rm I}$$. Of the four choices given after the statements, choose the one that best describes the two statements.

Statement - $${\rm I}$$: A point particle of mass $$m$$ moving with speed $$\upsilon $$ collides with stationary point particle of mass $$M.$$ If the maximum energy loss possible is given as $$f\left( {{1 \over 2}m{v^2}} \right)$$, then $$f = \left( {{m \over {M + m}}} \right).$$

Statement - $${\rm II}$$: Maximum energy loss occurs when the particles get stuck together as a result of the collision.

Statement - $${\rm I}$$ is true, Statement - $${\rm II}$$ is true; Statement - $${\rm II}$$ is the correct explanation of Statement - $${\rm I}$$.

Statement - $${\rm I}$$ is true, Statement - $${\rm II}$$ is true; Statement - $${\rm II}$$ is not the correct explanation of Statement - $${\rm I}$$.

Statement - $${\rm I}$$ is true, Statement - $${\rm II}$$ is false

Statement - $${\rm I}$$ is false, Statement - $${\rm II}$$ true.

AIEEE 2010

MCQ (Single Correct Answer)

-1

Statement - 1 : Two particles moving in the same direction do not lose all their energy in a completely inelastic collision.

Statement - 2 : Principle of conservation of momentum holds true for all kinds of collisions.

Statement - 1 is true, Statement - 2 is true; Statement - 2 is the correct explanation of Statement - 1

Statement - 1 is true, Statement - 2 is true; Statement - 2 is not the correct explanation of Statement - 1

Statement - 1 is false, Statement - 2 is true

Statement - 1 is true, Statement - 2 is false

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