WB JEE 2025 | Laws of Motion Question 6 | Physics

A force $\vec{F}=a \hat{i}+b \hat{j}+c \hat{k}$ is acting on a body of mass $m$. The body was initially at rest at the origin. The co-ordinates of the body after time ' $t$ ' will be

$\frac{a t^2}{2 m}, \frac{b t^2}{2m}, \frac{c t^2}{2 m}$

$\frac{a t^2}{2 m}, \frac{b t^2}{m}, \frac{c t^2}{2 m}$

$\frac{a t^2}{m}, \frac{b t^2}{2 m}, \frac{c t^2}{2 m}$

$\frac{a t^2}{2 m}, \frac{b t^2}{2 m}, \frac{c t^2}{m}$

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

What force $$\mathrm{F}$$ is required to start moving this $$10 \mathrm{~kg}$$ block shown in the figure if it acts at an angle of $$60^{\circ}$$ as shown? $$(\mu_s=0.6)$$

WB JEE 2024 Physics - Laws of Motion Question 4 English

22.72 N

24.97 N

25.56 N

27.32 N

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

A body of mass 2 kg moves in a horizontal circular path of radius 5 m. At an instant, its speed is 2$$\sqrt5$$ m/s and is increasing at the rate of 3 m/s$$^2$$. The magnitude of force acting on the body at that instant is,

6 N

8 N

14 N

10 N

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

If a string, suspended from the ceiling is given a downward force F₁, its length becomes L₁. Its length is L₂, if the downward force is F₂. What is its actual length?

$${{{L_1} + {L_2}} \over 2}$$

$$\sqrt {{L_1}{L_2}} $$

$${{{F_2}{L_1} + {F_1}{L_2}} \over {{F_2} + {F_1}}}$$

$${{{F_2}{L_1} - {F_1}{L_2}} \over {{F_2} - {F_1}}}$$

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