Simple Machines Quiz Review

Which diagram represents a lever with the input force and load on opposite sides of the fulcrum?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Answer explanation

Diagram A correctly shows a lever with the input force and load positioned on opposite sides of the fulcrum, illustrating correctly a First Class Lever.

Three of the following simple machines are part of the same family. Which one does NOT belong?

• pulley

• lever

• wedge

• wheel and axle

Which wedge would make the work the hardest to accomplish?

• First wedge

• Second wedge

• Third wedge

Answer explanation

The third wedge has the most shallow angle, requiring more force to drive it into the material, making the work the hardest to accomplish compared to the first and second wedges, which are easier to use. Imagine which you would use to split a log - this shape is the most desirable wedge for splitting.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What is the formula for mechanical advantage (MA) when given the forces?

• MA = Fr ÷ Fe

• MA = Le ÷ Lr

• MA = length ÷ height

• MA = Force x Distance

What is the mechanical advantage of a lever if the effort arm is 4 m and the resistance arm is 2 m?

• 2

• 4

• 0.5

• 8

What is the formula for mechanical advantage (MA) when given the forces?

• MA = Fr ÷ Fe

• MA = Fe ÷ Fr

• MA = Fr x Fe

• MA = Fe x Fr

If the force applied is 15 N and the work done is 45 J, what is the distance?

• 3 meters

• 1 meter

• 5 meters

• 10 meters

What is the formula for lever mechanical advantage (MA) when given the measurements?

• Lever MA = Le / Lr

• Lever MA = Lr / Le

• Lever MA = Le + Lr

• Lever MA = Le - Lr

Calculate the mechanical advantage of a crowbar if the resistance force is 3900 N and the effort force is 150 N?

• 26.00

• 26.50

• 25.00

• 27.00

Answer explanation

The mechanical advantage (MA) is calculated using the formula MA = Resistance Force / Effort Force. Here, MA = 3900 N / 150 N = 26.00. Thus, the correct answer is 26.00.

Tags

NGSS.MS-ETS1-1

What is the formula for work?

• Work = Force x Distance

• Work = Force + Distance

• Work = Force / Distance

• Work = Distance - Force