mechanical advantage

How much work is produced when 350 N is used to move a car 5 m (W=Fd)?

• 70 J
• 1750 J
• 355 J
• 175 J

Tags

CCSS.HSN.Q.A.1

CCSS.HSA.SSE.A.1

What is effort (input) force?

• the force one exerts on a machine

• the force which an effort force must overcome in order to do work on an object via a simple machine.

• the force the machine exerts on a object

• the output work times the input distance

Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground (W=Fd).

• 270 J
• 2646 J
• 333 J
• 3.00X10^-3 J

Tags

CCSS.HSN.Q.A.1

How is work defined?

• the amount of energy 
• the transfer of force over a distance
• rate of work in a given time
• the change in distance in a given time

Is this an example of work?
A teacher applies a force to a wall and becomes exhausted.

• True
• False

What is the equation for mechanical advantage?

• MA=input force*output force
• MA=output force/input force
• MA=input force/output force
• MA= output force - input force

Tags

CCSS.HSA.SSE.A.1

CCSS.HSA.CED.A.4

if a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?

• 120 N
• 5 N
• 2000 N
• 80 N

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

CCSS.7.EE.B.3

CCSS.7.EE.B.4

CCSS.7.NS.A.2

CCSS.7.NS.A.3

The amount by which a machine multiplies input force is known as the 

• work.
• power.
• output force.
• mechanical advantage.

the amount of work you do when you exert one Newton of force to move the object one meter

• joule

• newton

• meter

• output force

Tags

CCSS.HSN.Q.A.1

the rate at which work is done

• power

• work

• machine

• efficiency