Motion Class 9 MCQ Learn CBSE

An object experience a net zero external unbalanced force, then 1) It is possible for the object to travel with a non- zero velocity 2) only non- zero external force causes a motion 3) It is possible for the object to travel with a non- zero change in velocity 4) none of these

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Newton used the word ' mass in motion ' to represent 1) Linear momentum 2) Inertia of motion 3) Third law of motion 4) Inertia at rest

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The inertia of a body depends on 1) Shape 2) Volume 3) Mass 4) Area

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If the net force acting on an object is zero, then the body is said to be in the state of 1) Equilibrium 2) Motion 3) Inertia of motion 4) Uniform motion

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The scientist who said that " an object in motion will remain in same motion as long as no external force is applied " is 1) Aristotle 2) Galileo 3) Newton 4) Dalton

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It is advised to tie any luggage kept on the roof of a bus with a rope because 1) If not because tied with a rope, the luggage may fall behind the bus on the road. 2) As the bus moves ahead with acceleration, the luggage on the roof also moves along with it. 3) Due to inertia of rest or motion, the luggage slides on the roof in the forward or backward (rear) direction 4) All the above

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When a carpet is beaten with a stick, dust comes out of it because 1) It is due to the inertia of rest. 2) It is due to the inertia of motion. 3) It is due to the inertia of direction. 4) none of these

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It is easier to stop a tennis ball than a cricket ball moving with the same speed because 1) tennis ball is lighter than the cricket ball 2) It has a smaller momentum 3) smaller force is required to stop the tennis ball 4) all the above

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Action- Reaction forces act on 1) same body 2) different bodies 3) none of the bodies 4) all the above

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When a stone is tied to the end of the string and whirled in a circle if the string suddenly breaks then 1) The stone flies off tangentially along a straight line due to inertia of direction. 2) The stone falls down due to inertia of rest. 3) The stone flies off along a curved line due to inertia of motion. 4) None of these

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