The diagram shows a 3 . 0 m uniform beam AB, pivoted 1 . 0 m from the end A. The weight of the beam is 200 N . Copy the diagram and mark the beam's centre of mass.

The centre of mass correctly marked,as in the diagram. The Centre of mass of a body or system of a particle is defined as, a point at which the whole of the mass of the body or all the masses of a system of particle appeared to be concentrated. This point is called the centre of mass of the system of particles. The body at this point is balanced and hence no net torque(force) acts on it, thus the body remains in equilibrium.

The diagram shows a 3 . 0 m uniform beam AB, pivoted 1 . 0 m from the end A. The weight of the beam is 200 N . Add arrows to show the following forces: the weight of the beam; the contact forces on the beam at the pivot.

The arrows of the weight of beam and the contact forces on the beam at the pivot is shown in the diagram. The Centre of mass of a body or system of a particle is defined as, a point at which the whole of the mass of the body or all the masses of a system of particle appeared to be concentrated. This point is called the centre of mass of the system of particles. The body at this point is balanced and hence no net torque(force) acts on it, thus the body remains in equilibrium.

E M B I B E

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 3

HARD

Upper Secondary: IGCSE

IMPORTANT

Earn 100

Label your diagrams stable object and unstable object correctly.

Important Questions on Turning Effects of Forces

HARD

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 4

A force F acts on a long, straight beam, at a distance x from a pivot.
Draw a diagram to represent this.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 4

Write the equation you would use to calculate the moment of the force.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 4

Copy and complete the table to show the units of each of these quantities. (Give the symbol for each unit.)

Quantity	Unit
Force
Distance
Moment of force

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 5

What quantity is a measure of the turning effect of a force?

HARD

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 6

What two conditions must be met if an object is to be in equilibrium?

HARD

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 7

Write out step-by-step instructions for an experiment to find the position of the centre of mass of a plane lamina.

MEDIUM

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 8

The diagram shows a $3.0 m$ uniform beam AB, pivoted $1.0 m$ from the end A. The weight of the beam is $200 N$ .
Question Image
Copy the diagram and mark the beam's centre of mass.

HARD

Upper Secondary: IGCSE

IMPORTANT

Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 4 - Turning Effects of Forces>End-of-chapter questions>Q 8

The diagram shows a $3.0 m$ uniform beam AB, pivoted $1.0 m$ from the end A. The weight of the beam is $200 N$ .
Question Image
Add arrows to show the following forces: the weight of the beam; the contact forces on the beam at the pivot.

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