Laws of Motion — Practice Quiz
Maharashtra Board · Class 9 · Science
Try a 4-question quiz on Laws of Motion for Maharashtra Board Class 9 Science: tap an answer to check it and see why.
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Quick Quiz: Laws of Motion
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What is the SI unit of velocity?
If an object moves 100 m north and then 60 m south, what is its displacement?
Newton's first law of motion is also known as the law of:
What happens to acceleration when force increases and mass remains constant?
Sample Questions
Which of the following are vector quantities?
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Displacement, Velocity, Acceleration
Vector quantities have both magnitude and direction. Displacement, velocity, and acceleration are vectors. Distance, speed, and time are scalar quantities with only magnitude.
Which of the following demonstrate Newton's third law?
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Walking on ground, Recoil of gun, Rocket propulsion, Swimming
All involve action-reaction pairs: foot pushes ground/ground pushes foot; bullet forward/gun backward; exhaust gases down/rocket up; hands push water back/water pushes body forward. Free fall involves only gravity.
What is the formula for momentum?
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p = mv
Momentum is defined as the product of mass and velocity (p = mv). ma gives force, not momentum. The other options are incorrect relationships.
In uniform circular motion, which quantity remains constant?
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Speed
In uniform circular motion, speed remains constant but velocity changes due to continuous change in direction. Acceleration is present due to changing velocity.
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