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Work and Machines

Authored by Jennifer Sperl

Science

8th Grade

NGSS covered

Used 2+ times

Work and Machines
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30 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

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

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The rate at which work is done is called ____________.

force

mechanical advantage

power

efficiency

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The force you exert on a machine is called

input force

output force

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

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

input force

efficiency

output force

mechanical advantage

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

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

Answer explanation

You ALWAYS have to do the same amount of work! WORK NEVER CHANGES!!

Tags

NGSS.MS-ETS1-1

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The mechanical advantage of a sledgehammer (multiplies force) is _____________________.

equal to 1

less than 1

greater than 1

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

If the output force (OF) is greater than the input force (IF), the mechanical advantage (MA) will be _______________.

equal to 1

less than 1

greater than 1

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