Forces

The mechanical advantage of this inclined plane is...(MA=Resistance Force/Effort Force)

• 2.4

• 3.4

• 4.4

Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?

• 0

• 2

• 4

• 8

A pulley system uses a 250 N force to life a 2750 N crate. What is the mechanical advantage of the system?

• 11

• .09

• 687,500

• 1,100

If you add mass to an object that is touching the ground then...

• the friction increases

• the friction decreases

• the friction will remain the same.

The proper units of force are?

• ounces

• Newtonians

• Newtons

• None of them are proper units of force

Tags

NGSS.HS-PS2-4

You hold a box that weighs 300 N, how much force is pushing down on your hand

• 9.8 N

• Less than 300 N

• 300 N

• more that 300 N

Tags

NGSS.HS-PS2-1

the friction force vector always points...

• opposite the motion

• the same direction of motion

Mass and gravity combined is...

• weight

• friction

• heat

• Normal Force

Tags

NGSS.MS-PS2-4

Force pushing up due to a surface

• gravity

• weight

• normal force

Would the forces be balanced or unbalanced, if you push on an object and the object does not move?

• balanced

• unbalanced

Tags

NGSS.MS-PS2-2