Unit 4 Review

Unit 4 Review

12th Grade

49 Qs

quiz-placeholder

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Unit 4 Review

Unit 4 Review

Assessment

Quiz

Science

12th Grade

Practice Problem

Medium

NGSS
MS-PS3-4, MS-PS3-5, MS-PS3-1

+8

Standards-aligned

Created by

DANIEL FLORES

Used 51+ times

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49 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for work?

W= Fd

W= f/d

W= f/t

W= Ft

Answer explanation

The formula for work (W) is defined as the product of force (F) and distance (d) moved in the direction of the force. Therefore, the correct choice is W= Fd.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Imagine a man lifting a brick repeatedly in the air. How much work does he do with each lift if he lifts it 6.0 m and exerts an average force of 187 N?

2211 J

1122 J

0.03208 J

31.17 J

Answer explanation

Work is calculated using the formula: Work = Force x Distance. Here, Work = 187 N x 6.0 m = 1122 J. Therefore, the correct answer is 1122 J.

Tags

NGSS.MS-PS3-4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for power?

P = t/W

P = Wt

P = W/t

P = t/d

Answer explanation

The formula for power (P) is defined as the work done (W) divided by the time (t) taken to do that work. Therefore, the correct formula is P = W/t, which indicates how quickly work is done.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate MA: input force = 6.3 N; output force = 8.6 N

0.73

54.18

14.9

1.37

Answer explanation

Mechanical Advantage (MA) is calculated as output force divided by input force. Here, MA = 8.6 N / 6.3 N = 1.37. Thus, the correct answer is 1.37.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the six types of simple machines?

lever, the fulcrum, the wheel and axle, the inclined plane, the wedge, and the screw

lever, the pulley, the wheel and axle, the inclined plane, the faucet, and the nail

lever, the fulcrum, the wheel and axle, the inclined plane, the wedge, and the nail

lever, the pulley, the wheel and axle, the inclined plane, the wedge, and the screw

Answer explanation

The correct answer lists the six types of simple machines: lever, pulley, wheel and axle, inclined plane, wedge, and screw. Other options incorrectly include terms like 'fulcrum' or 'faucet' which are not types of simple machines.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What two simple machines make up a pair of scissors?

Two levers and a fulcrum

Two levers and a nail

Two axles and a wheel

Two inclined planes and a nail

Answer explanation

Scissors consist of two levers (the blades) that pivot around a fulcrum (the screw or pivot point). This allows them to cut effectively by applying force at the handles to the blades.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Simple machines are divided into two families, what are they?

Pulley family and Inclined plane family

Pulley family and Wedge family

Lever family and Inclined plane family

Inclined plane family and Wedge family

Answer explanation

Simple machines are categorized into two families: the Lever family and the Inclined plane family. These families encompass various types of simple machines that help in performing work more efficiently.

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