Force & Gravity

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

• F=Gm₁m₂/r

• F = Gm₁m₂/2r

• F = Gm₁m₂/r²

• F = m₁m₂/2r

Two factors effecting the size of the force of gravity between 2 objects are...

• Mass and distance

• Distance and weight

• Mass and matter

• Weight and mass

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

• 4x Bigger

• 2x Bigger

• 4x smaller

• 2x Smaller

The gravitational force between two bodies of masses m1 and m2 separated by distance r is F. What will happen to the force of gravity if one of the mass is doubled?

• 2F

• 4F

• 1/2F

• 1/4F

What is inertia?

• Amount of atoms

• The size

• Amount of gravitational pull

• Resistance to a change in motion

A rocket pushes burning gases DOWN which causes the rocket to launch UP. Which law is this?

• Newton's first law of motion

• Newton's 2nd law of motion

• Newton's 3rd law of motion

An object in motion stays in motion and an object at rests stays at rest UNLESS

• Acted on by a balanced force

• Acted on by an unbalance force

When a horse stops suddenly, the rider on its back continues to move forward into the ground. Which law is this?

• Newton's 1st law of motion

• Newton's 2nd law of motion

• Newton's 3rd law of motion

An object accelerates only when it is acted on by a ________ force

• Special

• Newton

• Balanced

• Unbalanced

Newton's third law states for every action, there is an _____________ reaction

• Opposite and equal

• unbalanced

• opposite and unequal

• Severe