Test: Angular Velocity Torque and Angular Momentum (July 25) - NEET MCQ

# Test: Angular Velocity Torque and Angular Momentum (July 25) - NEET MCQ

Test Description

## 10 Questions MCQ Test Daily Test for NEET Preparation - Test: Angular Velocity Torque and Angular Momentum (July 25)

Test: Angular Velocity Torque and Angular Momentum (July 25) for NEET 2024 is part of Daily Test for NEET Preparation preparation. The Test: Angular Velocity Torque and Angular Momentum (July 25) questions and answers have been prepared according to the NEET exam syllabus.The Test: Angular Velocity Torque and Angular Momentum (July 25) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Angular Velocity Torque and Angular Momentum (July 25) below.
Solutions of Test: Angular Velocity Torque and Angular Momentum (July 25) questions in English are available as part of our Daily Test for NEET Preparation for NEET & Test: Angular Velocity Torque and Angular Momentum (July 25) solutions in Hindi for Daily Test for NEET Preparation course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Angular Velocity Torque and Angular Momentum (July 25) | 10 questions in 20 minutes | Mock test for NEET preparation | Free important questions MCQ to study Daily Test for NEET Preparation for NEET Exam | Download free PDF with solutions
Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 1

### The earth rotates about an axis passing through its north and south poles with a period of one day. If it is struck by meteorites, then

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 1

Because angular momentum remains constant as the moment of inertia is increasing here so the angular velocity will decrease.

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 2

### Two discs of moments of inertia I1 and I2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speeds I1 and I2 are brought into contact face to face with their axes of rotation coincident. What is the angular speed of the two disc system?

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 2

As there is no any external force acting between the two discs so according to law of conservation of angular momentum, we get
L= Iω
So, I1ω1 + I2ω2 = (I1 + I2) ω

 1 Crore+ students have signed up on EduRev. Have you?
Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 3

### A child can balance himself on a moving cycle than on a stationary cycle. Based on

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 3

Spinning wheels have angular momentum, and when you're sitting on a bike, you and it and its wheels make up a system that obeys the principle of conservation of angular momentum.

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 4

A circus acrobat while performing spins brings his limbs closer to the body. Due to this

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 4

While in the pike position the body decreases in radius as each segment moves closer to the axis of rotation, resulting in angular velocity increasing and a decrease of moment of inertia. Thus, during a dive, angular momentum is constant meaning that moment of inertia is inversely proportional to angular velocity.

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 5

The mass of an electron is  9 x 10-31 kg. It revolves around the nucleus of an atom in a circular orbit of radius 4.5 Å, with a speed of  8 x 105m/s. The angular momentum of electron is

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 5

M=9x10-31Kg,r=4.5x10-10
V=8x105m/s
L=mvr
=9x10-31 x 4.5 x 10-10 x 8 x 10= 3.24 x 10-34 kgm2s-1

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 6

A circus acrobat while performing spins brings his limbs closer to the body. Due to this

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 6

Because when the moment of inertia decreases, rotational kinetic energy increases as work is done in decreasing the moment of inertia of the body.
A circus acrobat performs feats involving spin by bringing his arms and legs closer to his body or vice versa. On bringing the arms and legs closer to the body, his moment of inertia decreases. Hence his angular velocity increases. The reverse is also true.

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 7

An earth satellite is moving around the earth in a circular orbit. In such case, what is conserved?

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 7

An earth satellite is moving in a circular motion due to change in the direction of velocity. Its angular momentum about centre is conserved as there is no external force acting on the system.

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 8

In case of a projectile, the angular momentum is minimum

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 8

In case of a projectile, the angular momentum is minimum at the starting point.

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 9

kgm2s-1 is the unit of

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 9

L = Iw
L is the angular momentum, I is the MOI and w is the rotational velocity.
[I] = [ML2T0], [w] = [M0L0T-1]
[L] = [MLT-1]

Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 10

Space craft orientation is based on the principle of:

Detailed Solution for Test: Angular Velocity Torque and Angular Momentum (July 25) - Question 10

Conservation of angular momentum is a physical property of a spinning system such that its spin remains constant unless it is acted upon by an external torque; put another way, the speed of rotation is constant as long as net torque is zero.

## Daily Test for NEET Preparation

12 docs|366 tests
Information about Test: Angular Velocity Torque and Angular Momentum (July 25) Page
In this test you can find the Exam questions for Test: Angular Velocity Torque and Angular Momentum (July 25) solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Angular Velocity Torque and Angular Momentum (July 25), EduRev gives you an ample number of Online tests for practice

## Daily Test for NEET Preparation

12 docs|366 tests