Page 80 - Physics

Physics for Secondary Schools

Figure 3.20 (b) the spring extends by The response of one candidate was
5.0 cm. as listed below.
1. tension in a spring
2. air resistance
Beam
Beam 3. weight
balance
balance
Which among the alternatives shows
the correct examples of friction?
Standard masses
Standard masses Beaker in a scale panaker in a scale pan (a) 1 only
Be
(a) (b) 1 and 3
(c) 2 only
(d) 2 and 3
(iv) In an experiment to determine the
Spring
weight of coloured water, a student
was given a beam balance, beaker,
and coloured water as shown in
Beaker in a Figure 3.21. To do this, he/she has to
scale pan measure the mass of empty beaker,
(b) pour some water in a beaker and
Figure 3.20
measure the mass of beaker and
The experiment is then repeated water.
using the same apparatus on the
moon, where the acceleration of free
fall is one-sixth that on Earth. Which
statement describes what happens on
the Moon?
(a) The beam balance is balanced
and the spring extends by
5.0 cm. Figure 3.21
(b) The beam balance is balanced What is the weight of the water?
and the spring extends by less (a) 0.044 kg (c) 0.0044 N
than 5.0 cm. (b) 0.168 kg (d) 0.44N
(c) The right-hand balance pan is (v) A boy is pulling a box by a force
higher and the spring extends
by 5.0 cm. of 100 N, if the frictional force
(d) The right-hand balance pan is experienced by the box is 20 N. what
higher and the spring extends is the amount of force causing the
by less than 5.0 cm. motion of the box?
(iii) In Physics test students were asked (a) 100 N (c) 80 N
to mention the examples of friction. (b) 120 N (d) 5 N

74
Student’s Book Form One

Physics Form 1 Final.indd 74 16/10/2024 20:56