Work and mechanical Advantage

What is the relationship between work and energy?

• Work is the transfer of energy.

• Work is the same as energy.

• Energy is the cause of work.

• Work and energy are unrelated.

Tags

NGSS.MS-PS3-5

What is the equation for force?

• F = mass × acceleration

• F = mass + acceleration

• F = mass / acceleration

• F = mass - acceleration

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the difference between input force and output force?

• Input force is the force applied to a machine, while output force is the force exerted by the machine.

• Input force is always greater than output force.

• Input force is the force exerted by the machine, while output force is the force applied to a machine.

• Input force and output force are the same and can be used interchangeably.

What is mechanical advantage?

• The ratio of the output force to the input force in a machine.

• The measure of how much a machine multiplies force.

• The total energy output of a machine compared to its input.

• The speed at which a machine operates.

Tags

NGSS.MS-PS2-2

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

• 2

• 4

• 6

• 8

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NGSS.MS-PS2-2

How does friction affect work and mechanical advantage?

• Friction increases the efficiency of machines, requiring less input force to achieve the same output.

• Friction has no effect on work or mechanical advantage.

• Friction reduces the efficiency of machines, requiring more input force to achieve the same output.

• Friction only affects the speed of machines, not the work done.

What is the formula for calculating work?

• Work = Force + Distance

• Work = Force × Distance

• Work = Force / Distance

• Work = Distance - Force

Tags

NGSS.MS-PS3-5

What is the principle of conservation of energy in relation to work?

• Energy can be created and destroyed.

• Energy can only be created.

• Energy cannot be created or destroyed, only transformed.

• Energy is always lost in the form of heat.

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NGSS.MS-PS3-4

If a student uses 10 Newtons of Force to push a chair 5 meters, how much work is being done?

• 30 Joules

• 40 Joules

• 50 Joules

• 60 Joules

What is the significance of a lever in terms of mechanical advantage?

• A lever allows a smaller input force to lift a larger load.

• A lever increases the speed of an object without changing the force.

• A lever can only be used to lift objects vertically.

• A lever is used to change the direction of a force.