S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 21

HARD

10th ICSE

IMPORTANT

Earn 100

The figure shows a heavy wheel of mass $w$ that can rotate freely about the axis passing through point $O$ . The wheel is to be raised on the pavement $A B$ by applying a minimum force. Show the direction of application of force and calculate its magnitude.

Important Questions on Force

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 22

The figure shows a bar

A B

pointed in the middle at point

O

. Two forces

15 N

each act on this bar at ends

A

and

B

in opposite direction. What is magnitude of resultant moment of forces about

O

?

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MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 23

Three equal forces P. Q and R act in a plane but in different directions. The point O also lies in the same plane. Which force has the least moment about O? Which force has the largest moment about O? Give reasons to your answer.
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MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 24

A uniform metre scale balances horizontally at

44 cm

mark when a weight of

20 g

is placed at

15 cm

mark. What is weight of metre scale? Draw a diagram of arrangement.

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 25

Draw a neat labelled diagram to show the direction of two force

F_{1}

and

F_{2}

, acting on a body produce rotation on it about point

O

. What happens when (i)

F_{1} = F_{2}

, and (ii)

F_{1} > F_{2}

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 1

What is the difference between a particle and body?

EASY

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IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 2

Define centre of gravity of a body.

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 3

Whether centre of gravity of a body is always at geometrical centre of the body? Give examples.

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 1 - Force>QUESTIONS>Q 4

Can centre of gravity of a body lie outside the body? Give example.