Question

a) A simple pendulum stakes 32s to complete 20 oscillations. what is the time period of the

pendulum?

b) Athouba takes 15 minutes from his house to reach school on a bicycle. If the bicycle has speed of

2 m/s. Calculate the distance between his house and school?

c) Show the shape of the distance -time graph for the motion in the following .

i) A car moving with a constant speed.

ii) A car park on a roadside.

d) Name any two side effects of electric current ?

e) When the current is switched on through a wire, a compass needle kept nearby gets deflected

from its north-south position. Explain?​

Answer 1

Answer:

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Answer 2

Answer:

ans a- Time period of a pendulum is time taken by it to complete 1 oscillation. Hence, the time period of the pendulum is 1.6 seconds.

ans b- Given :

Speed of the bicycle= 2 m/s

Time taken by Salma to reach school from her house = 15 minutes = 15 × 60 s = 900 s

We know that speed = distance / time

Hence Distance = Speed × time

= 2 m/s × 900 sec

= 1800 m

=1.8 km

Distance between Salma's house and school =1.8 km

Explanation:

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