Introduction to Forces

Question 1

Diego is trying to lift a piano to the second floor of his house. Diego uses a pulley system and gives a big lift to the piano.The piano moves upward, then stops, and then it starts to fall to the ground. (The direction of the force of gravity is negative.)

Revolt · Accepted Answer

positive force → balanced force → negative force

Question 2

Which force best represents Fg?

Revolt · Accepted Answer

The weight of a barbell acting on a weight lifter is 80 N.

Question 3

If forces acting on an object are unbalanced, which factor may result from an unbalanced force?

Revolt · Accepted Answer

The net force is negative.

Question 4

Which units are used to measure force?

Revolt · Accepted Answer

newtons

Question 5

Emmett is lifting a box vertically. Which forces are necessary for calculating the total force?

Revolt · Accepted Answer

Fp and Fg

Question 6

Which best explains parallel forces?

Revolt · Accepted Answer

left and right forces that can be added together

Question 7

Polly is pushing a box to the right across the floor with a force of 30 N. The force of gravity is 8 N, and the normal force is 8 N. Which value could describe the force of friction if Polly could not move the box?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/evresources/d4d62b26e4c825591c75fb0efdafc8f5.png

Question 8

Jill is pushing a box across the floor. Which represents the upward force perpendicular to the floor?

Revolt · Accepted Answer

FN

Question 9

Two boxes need to be moved into storage. Jamal and Jude each want to move a box. The force of gravity on both the boxes is 50 N. Jamal is lifting with a force of 60 N, and Jude is lifting with a force of 45 N.

Revolt · Accepted Answer

Jamal moved his box to storage, but Jude could not move his.

Question 10

Which is the best example of forces acting in the same direction?

Revolt · Accepted Answer

two football players pushing a tackling sled

Introduction to Forces Answers

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