ICSE 10 Force Predicted Questions 2025 Physics Unit 1

1

What do you mean by Turning Effect (Torque)?

2

What are the factors affecting the Torque?

3

Define the Moment of Force. State its S.L. unit.

4

What is the Sign convention associated with Clockwise (-) and Anticlockwise (+) Moment?

5

What is a couple?

6

Give examples of moments produced due to a couple.

7

What do you mean by Equilibrium of a body and state the conditions required for a body to be in Equilibrium?

8

Numerical sums based on Moments and Principle of Moments.

9

On the basis of Moments, define the term Centre of Gravity.

10

State the factors on which the Centre of Gravity depends.

11

Define Uniform Circular Motion and explain

Centripetal Force. Identify the Centripetal Force in the given Uniform Circular Motion.

12

What is Centrifugal Force?

13

Why is the Centrifugal Force not a Reaction / Real Force?

14

The iron door of a building is 4 m broad. It can be opened by applying a force of 100 N normally at the middle of the door. The torque needed to open the door is?

15

A force of 10 newtons, with a 1-meter long moment arm, rotates a body in the anticlockwise direction. The torque is?

16

If a body is pivoted at a point and a force of 20 N is applied at a distance of 20 cm from the pivot. Then the moment of force about the pivot is?

17

(a) What is the position of the centre of gravity of a triangular lamina?

(b) When this triangular lamina is suspended freely from any one vertex, what is the moment of force produced by its own weight in its rest position?

18

(i) With reference to the direction of action, how does a centripetal force differ from a centrifugal force during uniform circular motion? 

(ii) Is centrifugal force the force of reaction of centripetal force? 

(iji) Compare the magnitudes of centripetal and centrifugal force.

19

Define moment of force. Write the relationship between SI and CGS unit of moment of force

20

(i) A brass ball is hanging from a stiff cotton thread. Draw a neat labelled diagram showing the forces acting on the brass ball and the cotton thread.

(ii) Why is a Jack screw provided with a long arm?

21

A uniform half-meter rule balances horizontally on a knife edge at the 29 cm mark when a weight of 20 gf is suspended from one end

(i) Draw a diagram of the arrangement. 

(ii) What is the weight of the half-meter rule?m

22

Differentiate between uniform circular motion and uniform linear motion.

23

A stone of mass m is rotated on a circular path with uniform speed by tying a strong string with the help of your hand. Answer the following questions:

(i) Is the stone moving with uniform or variable speed?

(ii) Is the stone moving with uniform acceleration? In which direction does the acceleration act?

(iii) What kind of force acts on the hand and states its direction?

24

On what factor does the position of the centre of gravity of a body depend? What is the S.I. unit of the moment of force?

25

Name the factors affecting the turning effect of a body.