Newton's First Law of Motion- Inertia

The astronomer Copernicus publically states in the 1500s that the Earth 

• does not move
• moves in a straight line
• revolves around the sun
• is the center of the solar system

Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane? 

• The ball would not rull up the other plane at all. 
• to nearly the original height
• to nearly twice the original height. 
• to nearly half it original height

The law of inertia states that on object...

• will continue moving at the same velocity unless na outside force acts on it
• will continue moving in a straight line unless an outside force acts on it
• at rest will stay at rest unless acted on by an outside force
• all of these

After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

• twice the force with which it was fired
• the same amount of force with which it was fired
• 1/2 the force with which it was fired
• zero, since no force is requires to keep it moving. 

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NGSS.HS-PS2-1

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If the force of gravity suddenly stopped acting on the planets they would

• spiral slowly toward the sun
• continue in their orbits for a short time
• move in straight lines tangent to their orbits
• fly straight away from the sun

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An object following a straight-line path at a constant speed 

• has zero acceleration
• has no forces acting on it
• has a net force acting in the direction of motion
• none of these

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NGSS.MS-PS2-2

An object following a straight-line path at a constant speed 

• has zero acceleration
• has no forces acting on it
• has a net force acting in the direction of motion
• none of these

One object has twice as much mass as another object. The first object also has also twice as much...

• velocity
• gracitational acceleration
• inertia
• all of these

Tags

NGSS.MS-PS2-2

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Compared to its weight on Earth, a 10kg object on the moon is 

• the same
• less
• more

Which has more mass, a kilogram of feathers or a kilogram of iron? 

• feathers 
• iron
• neither