NCERT Exemplar I — task. Science CBSE, Class 9.

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1. Which of the following statement is not correct for an object moving along a straight path in an accelerated motion?

(a) Its speed keeps changing
(b) Its velocity always changes
(c) It always goes away from the earth
(d) A force is always acting on it

2. According to the third law of motion, action and reaction

act on either body at normal to each other
always act on the same body
always act on different bodies in opposite directions
have same magnitude and directions

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