Mechanical Advantage and Efficiency

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

NGSS.MS-PS2-2

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

What is the mechanical advantage if you lift a load of 300 newtons and you only push down with 50 newtons?

• 250
• 50
• 60
• 6

Tags

NGSS.MS-PS2-2

Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?

• 1
• 10
• 1000
• 100

What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the 1machine?

• 0.25 J
• 26%
• 386%
• 3.86 J

Tags

NGSS.HS-PS3-1

What is the efficiency of the machine if the input is 263 J and the output is 142 J? 

• 6.26%
• 54%
• 100%
• 260%

Tags

NGSS.MS-PS3-5