WB JEE 2022 | Laws of Motion Question 7 | Physics

WB JEE 2022

MCQ (Single Correct Answer)

-0.5

A golf ball of mass 50 gm placed on a tee, is struck by a golf-club. The speed of the golf ball as it leaves the tee is 100 m/s, the time of contact on the ball is 0.02 s. If the force decreases to zero linearly with time, then the force at the beginning of the contact is

100 N

200 N

250 N

500 N

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

WB JEE 2021 Physics - Laws of Motion Question 8 English

Three blocks are pushed with a force F across a frictionless table as shown in figure above. Let N₁ be the contact force between the left two blocks and N₂ be the contact force between the right two blocks. Then,

F > N₁ > N₂

F > N₂ > N₁

F > N₁ = N₂

F = N₁ = N₂

WB JEE 2020

MCQ (Single Correct Answer)

-0.25

A block of mass m rests on a horizontal table with a coefficient of static friction $$\mu $$. What minimum force must be applied on the block to drag it on the table?

$${\mu \over {\sqrt {1 + {\mu ^2}} }}$$ mg

$${{\mu - 1} \over {\mu + 1}}$$ mg

$${\mu \over {\sqrt {1 - {\mu ^2}} }}$$ mg

$$\mu $$ mg

WB JEE 2019

MCQ (Single Correct Answer)

-0.25

Two weights of the mass m₁ and m₂ (> m₁) are joined by an inextensible string of negligible mass passing over a fixed frictionless pulley. The magnitude of the acceleration of the loads is

$${{{m_2} - {m_1}} \over {{m_2}}}$$

$${{{m_1}} \over {{m_2} + {m_1}}}g$$

$${{{m_2} - {m_1}} \over {{m_2} + {m_1}}}g$$

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