1
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A particle of mass m is projected at a velocity u, making an angle $$\theta$$ with the horizontal (x-axis). If the angle of projection $$\theta$$ is varied keeping all other parameters same, then magnitude of angular momentum (L) at its maximum height about the point of projection varies with $$\theta$$ as,

A
WB JEE 2023 Physics - Center of Mass Question 3 English Option 1
B
WB JEE 2023 Physics - Center of Mass Question 3 English Option 2
C
WB JEE 2023 Physics - Center of Mass Question 3 English Option 3
D
WB JEE 2023 Physics - Center of Mass Question 3 English Option 4
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

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,

A
6 N
B
8 N
C
14 N
D
10 N
3
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

In an experiment, the length of an object is measured to be 6.50 cm. This measured value can be written as 0.0650 m. The number of significant figures on 0.0650 m is

A
3
B
4
C
2
D
5
4
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A mouse of mass m jumps on the outside edge of a rotating ceiling fan of moment of inertia I and radius R. The fractional loss of angular velocity of the fan as a result is,

A
$$\frac{m R^{2}}{I+m R^{2}}$$
B
$$\frac{I}{I+m R^{2}}$$
C
$$\frac{I-m R^{2}}{I}$$
D
$$\frac{I-m R^{2}}{I+m R^{2}}$$
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