Mechanical Advantage

A 62 kg box is lifted 12 m off the ground. How much work was done? (hint: calculate weight of the box first)

• 5.17 J
• 72.91 J
• 744.0 J 
• 7291.2 J

Tags

NGSS.MS-PS3-2

What is effort (input) force?

• the force required by a machine in order to accomplish work (the force you put on the 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

Tags

NGSS.MS-PS2-2

What is resistance (output) force?

• the force required by a machine in order to accomplish work (the force you put on the 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

Tags

NGSS.MS-PS2-2

What is effort (input) distance?

• the force required by a machine in order to accomplish work (the force you put on the machine)
• the force which an effort force must overcome in order to do work on an object via a simple machine.
• the distance an input force moves a machine
• the output work times the input distance

What is resistance (output) distance?

• the force required by a machine in order to accomplish work (the force you put on the machine)
• the force which an effort force must overcome in order to do work on an object via a simple machine.
• the distance an input force moves a machine
• the distance through which the output force is exerted

What is the mechanical advantage of this pulley system?

• 2
• 3
• 4
• 5

Tags

NGSS.MS-PS2-4

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
• 100
• 1000

How does a single fixed puled, like the one seen here, help you do work?

• changes the direction of the force
• increases the amount of applied force
• decreases the amount of applied force
• allows you to pull the rope a shorter distance

Where should the fulcrum be placed in order for the student to use the least amount of effort possible? 

• point A
• point B
• point C
• point D

Tags

NGSS.MS-PS2-2

The mechanical advantage of this inclined plane is.....

• 2.4
• 3.4
• 4.4