Question

li) The mass of m2 was reduced to 50% and the force exerted by m1 on m2 was found to be 20 What will be the force exerted by m, on mı?

Answer 1

Answer:

A rocket with a lift-off mass 3.5×104 kg is blasted upwards with an initial acceleration of 10m/s2. Then the initial thrust of the blast is-

(A) 3.5×105N

(B) 7.0×105N

(C) 14.0×105N

(D) 175×101N

Newton’s third law of motion is often summarised as ‘Every action has an equal and opposite reaction’.

A book rests on a table. If the weight of the book is the ‘action’ force what is the ‘reaction’ force?

A. the pull of the book on the Earth

B. the pull of the Earth on the book

C. the push of the book on the table

D. push of the table on the book

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