AnswersHSPHY Physics Sem 1 26-27Lesson 1: Introduction to Forces

Lesson 1: Introduction to Forces Answers

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Which statements correctly describe forces? Check all that apply.Forces have the ability to change an object’s state of motion.Forces are vectors. Forces are measured in joules.Forces are measured in newtons.Forces can have a positive or negative value to indicate direction.

A
Forces have the ability to change an object’s state of motion.
B
Forces are vectors.
C
Forces are measured in joules.
D
Forces are measured in newtons.
E
Forces can have a positive or negative value to indicate direction.
3

A book is at rest on a table. Identify the correct free-body diagram for this situation.

A
Option
B
Option
C
Option
4

Which of these would be a part of a force diagram for this image? Check all that apply.

A
a dot that represents the box
B
a vector labeled Fg, pointing straight down
C
a vector labeled FN, pointing straight up, directly opposite Fg
D
a vector labeled Fp, pointing parallel to and down the ramp
E
a vector labeled Ffs, pointing parallel to and up the ramp
5

What is the net force acting on the piano?

A
11,500 N
B
–11,500 N
C
500 N
D
–500 N
7

Identify the situations that have an unbalanced force. Check all that apply.a weight speeds up as it falls through the aira garbage can is at rest on the grounda hockey puck moves in a straight line at a constant speeda bumper car hit by another car moves off at an anglea balloon flies across the room when the air is released

A
a weight speeds up as it falls through the air
B
a garbage can is at rest on the ground
C
a hockey puck moves in a straight line at a constant speed
D
a bumper car hit by another car moves off at an angle
E
a balloon flies across the room when the air is released

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