Gujarati
4-1.Newton's Laws of Motion
easy

A rocket can go vertically upwards in earth's atmosphere because

A

It is lighter than air

B

Of gravitational pull of the sun

C

It has a fan which displaces more air per unit time than the weight of the rocket

D

Of the force exerted on the rocket by gases ejected by it

Solution

In accordance with Newton's $3^{rd}$ Law of Motion the exhaust exerts an equal and opposite force on the rocket which propels it upward enabling it to overcome the gravitational force of the earth.It flies along a path at an angle to the earth's surface which places the payload in an orbit around the earth.

Standard 11
Physics

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