
Introduction to Forces
Authored by Andrew Hogan
Science
8th Grade
NGSS covered
Used 1+ times

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27 questions
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1.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Forces act upon an object by pushing or
Tags
NGSS.MS-PS2-2
NGSS.MS-PS2-1
2.
MULTIPLE SELECT QUESTION
30 sec • 5 pts
Two examples of noncontact forces are __________ and __________.
friction
gravity
motion
magnetism
Answer explanation
Gravity and magnetism occur without anything being touched directly.
Ex. a paperclip is pulled through air toward a magnet
Ex. a pen falls to the ground because of its attraction to Earth's gravitational pull
Tags
NGSS.MS-PS2-4
NGSS.MS-PS2-5
3.
MULTIPLE SELECT QUESTION
30 sec • 5 pts
Which of these are true statements about FORCE?
The unit of force is the Newton.
Contact forces include friction and gravity.
Force is measured with a spring scale.
A force is a push or a pull.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Think of 2 teams of students in PE playing tug-O-war. One of the teams is winning. What is true about the forces involved?
The forces between the teams are balanced
The forces between the teams are unbalanced
There are no forces involved
Both teams have equal net force
Tags
NGSS.MS-PS2-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Polly is pushing a box 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?
–30 N
–8 N
8 N
30 N
Answer explanation
The force of friction is resisting Polly's efforts. If the force of friction is to stop her, it must be the opposite of the force she is applying, and of equal or greater magnitude.
Tags
NGSS.MS-PS2-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
15. Why is the Earth's gravity stronger than the Moon's gravity?
The Earth is more massive than the Moon
The Moon is so far away from Earth
The Moon as no mass
The Earth has a larger volume (takes up more space) than the Moon
Tags
NGSS.MS-PS2-4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. Which pair of objects has the largest gravitational force?
A. marble and car
B. marble and baseball
C. car and bowling ball
D. There is no gravitational force between any of these pairs of objects.
Tags
NGSS.MS-PS2-4
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