9.Gravitation WHole chapter ------ Akshay Aggarwal

What did Isaac Newton propose was responsible for the motion of the moon and planets?

• Electromagnetic force
• Gravitational force
• Nuclear force
• Frictional force

What is required to change the speed or direction of an object's motion?

• Temperature change
• Magnetic field
• Force
• Light intensity

What is the force that keeps an object moving along a circular path called?

• Tension force
• Gravitational force
• Centripetal force
• Frictional force

According to Newton, what force causes objects to fall towards the Earth and planets to orbit the Sun?

• Magnetic force
• Centrifugal force
• Gravitational force
• Electromagnetic force

What did Newton hypothesize about the force acting on the moon and an apple?

• Different forces are at play
• They are affected by air resistance
• The same force acts on both
• The moon is attracted to the sun

In the context of circular motion, what does the term "centripetal" mean?

• Center of the motion
• Center-seeking
• Centrifugal
• Centrifugal acceleration

Why did Newton believe the moon does not move in a straight line?

• It has an erratic motion
• It is constantly changing its direction
• It is affected by Earth's magnetic field
• It is attracted by Earth's gravitational force

What did Newton observe that led him to think about the nature of forces?

• A falling apple
• A shooting star
• A moving train
• A flying bird

What type of force does Newton propose is responsible for the moon's motion?

• Electrostatic force
• Centripetal force
• Gravitational force
• Tension force

In the context of the apple falling on Newton's head, what made him start thinking about forces?

• The sudden impact
• Curiosity about trees
• The change in direction of the apple
• The sound of the impact