Understanding Gravitational Force and Universal Law of Gravitation

What is the primary reason objects fall towards the Earth?

• Magnetic force

• Gravitational force

• Nuclear force

• Electric force

Who is the prominent scientist known for explaining the Universal Law of Gravitation?

• Albert Einstein

• Galileo Galilei

• Isaac Newton

• Niels Bohr

According to the Universal Law of Gravitation, the gravitational force between two masses is directly proportional to:

• The product of the masses

• The difference of the masses

• The square of the masses

• The sum of the masses

What is the value of the gravitational constant (G) used in the formula for gravitational force?

• 6.67 x 10^-11 N m²/kg²

• 1.6 x 10^-19 C

• 9.8 m/s²

• 3.14

According to Newton's third law of motion, if the Earth exerts a force on the Moon, what does the Moon do?

• Exerts a larger force on the Earth

• Exerts an equal force on the Earth

• Exerts a smaller force on the Earth

• Exerts no force on the Earth

In the example calculation, what is the gravitational force between the boy and the girl?

• 4.8 x 10^-7 N

• 10 N

• 6.67 x 10^-11 N

• 0 N

Why do the boy and the girl not feel the gravitational force between them?

• The force is extremely small

• The force is too large

• They are too far apart

• They are not in contact

If the distance between two masses is doubled, how does the gravitational force change?

• It halves

• It decreases to a quarter

• It quadruples

• It doubles

What happens to the gravitational force if the distance between two objects is tripled?

• It increases nine times

• It decreases to a third

• It remains the same

• It decreases to a ninth

What law does gravitational force follow due to its dependence on distance?

• Inverse cube law

• Direct square law

• Direct cube law

• Inverse square law