Laws of Motion

When a heavy football player and a light one run into each other, who exerts more force?

• The heavy one
• The light one
• They are equal
• there is no such thing as force

Tags

NGSS.MS-PS2-1

Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 

• feathers 
• iron
• same
• depends on their friction

A crumpled piece of paper hits the ground before a flat sheet of paper because

• the acceleration of gravity is greater on the  crumpled paper.
• there is more air resistance against the flat paper.
• the crumpled paper is more massive
• the crumpled paper is less massive.

Tags

NGSS.MS-PS2-4

Which of the following never changes no matter where in the universe?

• weight
• force
• mass
• pounds

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NGSS.MS-PS1-5

The sum of all forces acting on an object and direction

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

Tags

NGSS.MS-PS2-2

"Terminal velocity" is the velocity at which _____

• air resistance is less than weight
• air resistance is equal to weight
• air resistance is greater than weight
• you'd die if you hit the ground

Is this statement TRUE or FALSE: If the forces acting on an object are balanced, the object CANNOT be moving.

• TRUE
• FALSE

Tags

NGSS.HS-PS2-1

How does a parachute help a skydiver land safely?

• It increases his terminal velocity by decreasing his air resistance.
• It increases his terminal velocity by increasing his air resistance.
• It decreases his terminal velocity by decreasing his air resistance.
• It decreases his terminal velocity by increasing his air resistance.

Tags

NGSS.MS-PS3-5

Objects have a tendency to resist change in their

• Velocity

• Acceleration

• Force

• Speed

Tags

NGSS.MS-PS2-2

What are the factors that affect the amount of air resistance on an object? Mark all that apply.

• surface area

• velocity

• acceleration

• weight

• mass