Force and Motion Study Guide

QuizÂ by Cheryl McLawhorn

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41 questions
• Q1
Leah watches a toy car move across a table at a constant speed. The car moves across the table in one direction and falls off the other side. Leah decides to try another situation. She watches the car move across the table at a constant speed, then when it reaches the other side of the table, her friend Joey pushes the car in the other direction. The car moves back to Leah. Based on Leah's informal experiment, the car changes direction because of _______ force, which happens because _______.
a balanced; Joey pushes the car
an unbalanced; Joey pushes the car
an unbalanced; Leah watches the car
a balanced; the car moves across the table
120s
• Q2
Melinda and Bart are sitting beside each other in the third car of a roller coaster. From whose reference point are Melinda and Bart moving away from the observer?
a person standing on the ground in front of the roller coaster
a person sitting in the first car of the roller coaster
a person sitting in the last car of the roller coaster
a person standing on the ground behind the roller coaster
120s
• Q3
Jennifer stands on one side of a filing cabinet and pushes with a force of 60 N. If Nathan wants to help Jennifer demonstrate balanced forces, what does he need to do?
cause the cabinet to move
stand on the same side of the cabinet and push with a force of 60 N in the same direction as Jennifer
stand on the opposite side of the cabinet and push with a force of 60 N toward Jennifer
stand on the opposite side of the cabinet and push with a force of 120 N toward Jennifer
120s
• Q4
An object travels a given distance at a speed of 5 m/s. If the object travels the same distance at a higher speed, how will the faster speed affect the time it takes the object to travel the distance?
It will take less time to travel the distance.
It will take more time to travel the distance.
The time will not be affected.
The time will remain constant.
120s
• Q5
A hockey puck slides across an ice rink more easily than it does across a rough concrete surface. Why is this?
There is more gravity on the ice rink.
There is less gravity on the ice rink.
There is more friction on the ice rink
There is less friction on the ice rink.
120s
• Q6
If the swing set shown above is the reference point, which statement correctly describes the car's motion as it moves from position 1 to position 2?
The car is approaching, then moving away.
The car is approaching.
The car is not moving relative to the swing set.
The car is moving away
120s
• Q7
_______ measures an object's change in position per unit time.
Distance
Force
Speed
Acceleration
120s
• Q8
How would the forces on the book best be described?
The forces on the book are unbalanced
The forces on the book are balanced
The forces on the book cause a change in the book's motion.
The forces on the book do not cancel each other out.
120s
• Q9
The motion of an object can be described by its
speed
direction
all of these
position
120s
• Q10
A book is sitting on the table at rest. The forces acting on the book include _______, and these forces are _______.
gravity pushing up and friction pushing to the right; balanced
gravity pushing up and friction pushing to the right; unbalanced
gravity pushing down and the table pushing up; unbalanced
gravity pushing down and the table pushing up; balanced
120s
• Q11
Hannah just finished building a house of cards that stands four stories high. She is worried that it will fall down. Which of the following statements is definitely TRUE?
If no unbalanced force acts upon the house of cards, then it will remain standing forever.
If Hannah adds another card to the house of cards, then it will fall down
A house of cards is too fragile and must fall down eventually.
As long as nobody touches the house of cards, it will remain standing
120s
• Q12
Look at the rock sitting on the hill in the picture above. Gravity should make the rock slide down the hill. What force is acting to balance gravity, keeping the rock in place?
centripetal force
gravity
friction
momentum
120s
• Q13
A train is speeding down a railroad track at a speed of 50 miles per hour. From whose reference point is the train not moving?
a person sitting on the tracks 1 mile in front of the train
a person sitting on the tracks 1 mile behind the train
a person standing to the side of the railroad tracks
a person sitting on the train
120s
• Q14
Barry knocks a baseball into the air with his bat. Shortly after the ball is hit, it is traveling at 25 m/s to the east and parallel to the ground. After two seconds, the ball is 50 meters to the east of Barry. Which of the following best describes the ball's direction of motion?
East
2 s
50 m
25 m/s
120s
• Q15
If an object is moving at a constant speed in one direction, what is needed to change its speed or direction?
a long period of time
a short period of time
a balanced force
an unbalanced force
120s

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