Force and motion

Why is it harder for the boy in Image B to get down the hill?

• Motion
• Friction
• Work
• Displacement

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Speed is equal to 

• Distance/Time
• Time/Distance
• Time x Distance
• Acceleration

What is a change of position of an object?

• motion
• weight
• mass

the amount of matter an object has is its

• velocity
• mass
• inertia
• momentum

The force that pulls objects to earth or toward each other

• force
• gravity
• friction
• work

what is force ?

• a push

• a push or pull

• the direction an object is moving

• all of the above

true or false -- the force acting on you due to the earth is called your gravity

• false

• true

• --

• --

what was the name of the scientist who discovered the laws of motion ?

• Thomas Edison

• Issac Newton

• Benjamin Franklin

• Archimedes

what is the SI unit of force ?