Rotational Motion of A Rigid Body (6.3-6.4)

Rotational Motion of A Rigid Body (6.3-6.4)

12th Grade

10 Qs

quiz-placeholder

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Rotational Motion of A Rigid Body (6.3-6.4)

Rotational Motion of A Rigid Body (6.3-6.4)

Assessment

Quiz

Physics

12th Grade

Medium

Created by

FATIN BM

Used 6+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Suppose a man is sitting on a rotating chair and his arms are outstretched. If he suddenly shortens his arms, what will happen?

ω will decrease

ω will remain constant

I will decrease

L will increase

Answer explanation

When the arm is shorten, the I decreases. So the chair will rotates faster (ω larger).

Smaller I means smaller resistance and easy to rotate.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT TRUE about moment of inertia ?

ΣI = mr2

is the object's resistance to change rotational motion.

I depends on the angular velocity

In principle of conservation of angular momentum, if I is larger, the angular speed is smaller.

Answer explanation

Moment of inertia, I = mr2.

Thus, I depends on

1) mass

2) distribution of mass

3) position of the axis of rotation.

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Moment of inertia of a body comes into play ...........

in motion along a curved path

in linear motion

in rotational motion

none of the answers

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Choose the WRONG equation.

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Moment of inertia does NOT depend upon :

angular velocity of the body

shape and size

mass

position of the axis of rotation

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During a summersault (balik kuang), a swimmer bends his body to

increase the moment of Inertia

decrease the moment of Inertia

decrease the angular momentum

reduce the angular velocity

Answer explanation

Decreasing the I, means increasing the ω (spins faster).

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Angular momentum is represented by

L

M

I

P

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