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Questions and Answers
What is the force responsible for the motion of planets around the Sun and the moon around the earth?
What is the force responsible for the motion of planets around the Sun and the moon around the earth?
- Gravitational force (correct)
- Centripetal force
- Electromagnetic force
- Frictional force
In the example activity 8.11, what did the motion of the stone indicate when the thread was released?
In the example activity 8.11, what did the motion of the stone indicate when the thread was released?
- It moved in a circular path
- It moved in a parabolic path
- It moved in a zigzag pattern
- It moved in a straight line (correct)
What did Isaac Newton realize about the force responsible for the motion of celestial bodies?
What did Isaac Newton realize about the force responsible for the motion of celestial bodies?
- It is different for each celestial body
- It only affects planets, not moons
- It is the same force acting on all celestial bodies (correct)
- It varies based on the size of the celestial body
What type of force is needed to change the speed or direction of motion of an object?
What type of force is needed to change the speed or direction of motion of an object?
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What is the direction of motion of an object dropped from a height towards the earth?
What is the direction of motion of an object dropped from a height towards the earth?
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