JEE Main 2020 (Online) 6th September Morning Slot | Rotational Motion Question 69 | Physics

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

Four point masses, each of mass m, are fixed at the corners of a square of side $$l$$. The square is rotating with angular frequency $$\omega $$, about an axis passing through one of the corners of the square and parallel to its diagonal, as shown in the figure. The angular momentum of the square about this axis is : JEE Main 2020 (Online) 6th September Morning Slot Physics - Rotational Motion Question 72 English

JEE Main 2020 (Online) 6th September Morning Slot Physics - Rotational Motion Question 72 English

3m$$l$$²$$\omega $$

4m$$l$$²$$\omega $$

m$$l$$²$$\omega $$

2m$$l$$²$$\omega $$

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

A satellite is in an elliptical orbit around a planet P. It is observed that the velocity of the satellite when it is farthest from the planet is 6 times less than that when it is closest to the planet. The ratio of distances between the satellite and the planet at closest and farthest points is:

1 : 2

1 : 3

1 : 6

3 : 4

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

Shown in the figure is a hollow icecream cone (it is open at the top). If its mass is M, radius of its top, R and height, H, then its moment of inertia about its axis is : JEE Main 2020 (Online) 6th September Morning Slot Physics - Rotational Motion Question 71 English

JEE Main 2020 (Online) 6th September Morning Slot Physics - Rotational Motion Question 71 English

$${{M\left( {{R^2} + {H^2}} \right)} \over 3}$$

$${{M{R^2}} \over 2}$$

$${{M{R^2}} \over 3}$$

$${{M{H^2}} \over 3}$$

JEE Main 2020 (Online) 6th September Morning Slot

MCQ (Single Correct Answer)

-1

A clock has a continuously moving second's hand of 0.1 m length. The average acceleration of the tip of the hand (in units of ms^–2) is of the order of :

10^-3

10^-1

10^-2

10^-4

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