Gravitation

Newton said that any two masses will...

• combine into a larger mass.

• attract each other.

• create gravitational fields.

• push each other apart.

Tags

NGSS.HS-PS2-4

According to Newton's law of gravitation, the Earth and the Moon are gravitationally attracted to each other. The more massive Earth attracts the Moon with...

• a stronger force than the Moon attracts the Earth.

• a weaker force than the Moon attracts the Earth.

• the same force as the Moon attracts the Earth.

• a force that is sometimes stronger and other times weaker than the Moon attracts the Earth.

Tags

NGSS.HS-PS2-4

What states that "every object in the universe attracts every other object"?

• Law of Universal Gravitation
• Newton's First Law of Motion
• My mother
• Inertia & gravity

Tags

NGSS.HS-PS2-4

Which of the following is Newton's Law on Gravitation?

• F=Gm₁m₂/r
• F = Gm₁m₂/r²
• F = Gm₁m₂/2r
• F = m₁m₂/2r

Tags

NGSS.HS-PS2-4

If I double the distance between two objects, what happens to their gravitational Force?

• 4x bigger
• 4x smaller
• 2x bigger
• 2x smaller

Tags

NGSS.HS-PS2-4

The gravitational force between two bodies of masses m1 and m2 separated by distance r is F. State the effect on the gravitational force when m1 increases twice.

• 2F

• 1/2 F

• 4F

• 4F

Given the mass of the earth is 5.97x10^24 kg, radius of the earth is 6.37x10^6 m, G = 6.67x10^-11 N m^2 kg^-2. Calculate the gravitational acceleration of object B at 400 km height from the surface of the earth.

• 8.00 N kg^-1

• 8.23 N kg^-1

• 8.57 N kg^-1

• 8.69 N kg^-1

What happen to the gravitational acceleration to an object if the object is moving from surface of the planets to the outer space?

• increases

• decreases

• unchanged

• increase, then decrease

A man-made satellite move orbiting the earth at 265 km height from the surface of the earth with speed 4000 m s^-1. What is the centripetal acceleration while its orbiting the earth? Radius of the earth is 6.37x10^6 m, G = 6.67x10^-11 N m^2 kg^-2.

• 2.4 m s^-2

• 2.5 m s^-2

• 50.5 m s^-2

• 60.4 m s^-2

Please write you answer with unit of years.