Question

1.) state two similarities and two dissimilarities between the motion of a bicycle and a ceiling fan that has been switched on. (mark 20)


2.) state four precautions that you should take while measuring length with a ruler ? (mark 20)
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Answer 1

Explanation:

Similarities (i) The wheel of a bicycle and a ceiling fan execute a rotational motion on a fixed axis. (ii) The particles of both exhibit circular motion except the particles at the centre. Differences (i) Bicycle change its position while exhibiting circular motion but a ceiling fan does not change its position.

Answer 2

Answer:

1Similarities (i) The wheel of a bicycle and a ceiling fan execute a rotational motion on a fixed axis. (ii) The particles of both exhibit circular motion except the particles at the centre. ... (ii) Bicycle can execute rectilinear motion with translational motion but ceiling fan does not execute rectilinear motion.

2.The precautions to be taken while using a meter scale to measure lengths are as follows : (1) The scale should be placed to the side of the object being measured. It should also be in touch with the object being measured. (2) While reading the scale, eye must be placed vertically above the scale mark being read.