Work and Machines Quiz Review

In order for work to be done on an object, the object must __________________.

• not move at all

• move some distance in the direction of the force applied to it

• move some distance in the opposite direction of the force applied to it

The rate at which work is done is called ____________.

• force

• mechanical advantage

• power

• efficiency

The unit for work is called a

• Newton

• Joule

• Joule-meter

• Watt

The unit for force is called a

• Newton

• Joule

• Joule-meter

• Watt

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The force you exert on a machine is called

• input force

• output force

A machine's _______________ is the number of times the machine increases a force exerted on it.

• input force

• efficiency

• output force

• mechanical advantage

What is output work?

• work a machine does on an object

• work you do on a machine

• work a machine does on you

• work the object does on a machine

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A machine can not change the ________________________.

• direction of the input force

• amount of work needed to do a task

• distance over which a force is applied

• amount of force needed to do a task

What is the efficiency of an ideal machine?

• greater than 100%

• equal to 100%

• less than 100%

Tags

NGSS.MS-PS3-5

The force a machine applies to an object is called _______________.

• input force

• output force