CAIE IGCSE Physics 1.5.2 Turning Effect of Forces Topic Practice

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Question 1

[Maximum number: 1]

Three simple machines are shown.

1

1

moving soil with a wheelbarrow

2

2

cutting string with scissors

3

3

screwing a screw with a screwdriver

Which machines are an application of the moment of a force?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 and 3 only

Question 2

[Maximum number: 1]

Each diagram shows three forces on a beam.
In which situation is it possible for the three forces shown to be in equilibrium?

Figure for Question 2 — CAIE IGCSE Physics
Figure for Question 2 — CAIE IGCSE Physics
Figure for Question 2 — CAIE IGCSE Physics
Figure for Question 2 — CAIE IGCSE Physics

Question 3

[Maximum number: 1]

A weightless beam is balanced on a pivot as shown. Forces P, Q and R act on the beam.

Figure for Question 3 — CAIE IGCSE Physics

Which equation is correct?

A

(P×c)+(Q×b)=(R×a)(\mathrm{P} \times c)+(\mathrm{Q} \times b)=(\mathrm{R} \times a)

B

(P×c)−(Q×b)=(R×a)(\mathrm{P} \times c)-(\mathrm{Q} \times b)=(\mathrm{R} \times a)

C

(P×d)+(Q×b)=(R×a)(\mathrm{P} \times d)+(\mathrm{Q} \times b)=(\mathrm{R} \times a)

D

(P×d)−(Q×b)=(R×a)(\mathrm{P} \times d)-(\mathrm{Q} \times b)=(\mathrm{R} \times a)

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