AnswersKCPS Physics First 2027Introduction to Forces

Introduction to Forces — Quiz Answers

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Which force best represents cap f sub g ?

A
A weight lifter is pushing a barbell upward with a force of 90 cap n .
B
A box on a rough table has difficulty sliding past 25 cap n of force.
C
The amount of upward force of a table on a box is 25 cap n .
D
The weight of a barbell acting on a weight lifter is 80 cap n .
3

An object is moving across a surface, but it does not gain or lose speed. Which best describes the object’s force?

A
The positive force is greater than the negative force.
B
The negative force is greater than the positive force.
C
The net force is positive.
D
The net force is zero.
4

Which best explains parallel forces?

A
addition of parallel forces that cannot result in a negative force
B
left and downward forces that cancel each other out
C
right and upward forces that cancel each other out
D
left and right forces that can be added together
5

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

A
cap f sub p , cap f sub cap n , and cap f sub f
B
cap f sub p and cap f sub g
C
cap f sub p , cap f sub f , and cap f sub g
D
cap f sub p and cap f sub cap n
6

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

A
a person pulling out a garden hose from its reel
B
two football players pushing a tackling sled
C
two dogs playing tug-of-war with a rope
D
a boy lifting his chest off the ground during a pushup
9

Which best describes two counteracting forces on an object?

A
using a dolly to push a box to another location
B
two children pulling apart a wishbone
C
two people pushing a broken-down car up the road
D
a group of dogs pulling a dogsled across ice

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