ICSE Class 8CISCE
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True and False 

A force always produces both the linear and turning motions.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

True and False 

Moment of force = force × perpendicular distance of force –  from the pivoted point.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

True and False 

Less force is needed when applied at a farther distance from the pivoted point.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Fill in the blank 

Moment of force =...............  × distance of force from the point of turning.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Fill in the blank 

In a door, handle is provided  ......... from the hinges.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Fill in blank 

hrust is the ............ force acting on a surface.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Match the column 

Column A  Column B
(a) Camel (1) broad and deep foundation
(b) Truck  (2) broad feet 
(c) Knife (3) six or eight tyres 
(d) High building (4) sharp cutting edge
(e) Thrust (5) atm
(f) Moment of force  (6) N
(g) Atmospheric pressure  (7) N m

 

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Select the correct alternative

SI. unit of moment of force is

  1. N
  2.  N cm
  3.  kgfm
  4.  N m
[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Select the correct alternative

To obtain a given moment of force for turning a body, the force needed can be decreased by

  1. applying the force at the pivoted point
  2.  applying the force very close to the pivoted point
  3.  applying the force farthest from the pivoted point
  4.  none of the above
[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Define force. State its S.I. unit.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

State two effects of a force when applied on a body.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

How does the effect of force differ when it is applied on
a I rigid body, and ?

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

How does the effect of force differ when it is applied on
a non-rigid body ?

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

State the effect of force F in of the following diagram.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

State the effect of force F in  of the following diagram.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Define the term moment of force.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

State the S.I. unit of moment of force.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

State two factors on which affect moment of force.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

In Fig. a force F is applied in a direction passing through the pivoted point O of the body. Will the body rotate ? Give reason to support your answer.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)

Write the expression for the moment of force about a given axis of rotation.

[3] Force and Pressure
Chapter: [3] Force and Pressure
Concept: Turning Effect of Force (Moment of Force)
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