Rotational Motion-Torque (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 2 of 2

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Question number: 1

» Rotational Motion » Torque

Appeared in Year: 2014

MCQ▾

Question

A simple pendulum is attached to the block which slides without friction down an inclined plane (ABC) having an angle of inclination α as shown.

Free body diagram of pendulum

Free Body Diagram of Pendulum

In figure forces acting on a simple pendulum is attached to the block which slides without friction down an inclined plane is shown

While the block is sliding down the pendulum oscillates in such a way that its mean position the direction of the string is –

Choices

Choice (4) Response
a.

vertically downwards

b.

parallel to the inclined plane AC.

c.

at angle α to the perpendicular to the inclined plane AC.

d.

perpendicular to the inclined plane AC.

Question number: 2

» Rotational Motion » Torque

Appeared in Year: 2013

MCQ▾

Question

A wheel of radius R with an axle of radius R2 is shown in the figure and is free to rotate about a frictionless axis through its centre and perpendicular to the page. Three forces (F, F, 2F) are exerted tangentially to the respective rims as shown in the figure,

A wheel of radius R with an axle of radius R/2

A Wheel of Radius R With an Axle of Radius R/2

In figure a wheel of radius R with an axle of radius R/2 is shown. Three forces: F, F and 2F are exerted tangentially to the respective rims

The magnitude of the net torque acting on the system is nearly

Choices

Choice (4) Response
a.

1.5 FR

b.

3.5FR

c.

2.5 FR

d.

3.2 FR

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