Khalifa is picking up a pencil dropped on the ground. He is picking the pencil up with a force of 32N. Earth's gravity is pulling the chair down with a force of 20N. What is the net force?
The net force =
Lesson 1: Describing Motion and Force
Quiz
•
English
•
8th Grade
•
Easy
lina Zendah
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khalifa is picking up a pencil dropped on the ground. He is picking the pencil up with a force of 32N. Earth's gravity is pulling the chair down with a force of 20N. What is the net force?
The net force =
12N up
12N down
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A place or object used for comparison to determine whether something is in motion
Friction
Reference point
transfer enery
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which one is an example of a force pushing downward toward the ground?
a. A bird sat on a telephone wire.
c. A man pulled weeds in his garden.
d. A dog tugged on a rope a child held.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The measuring unit of force is:
a. Meter
b. Reference point
c. Newton
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Carmen is helping load furniture and boxes onto a moving truck. She picks up boxes of her things, places them on a cart, and pushes the cart to the moving van. Which term best describes the type of force Carmen uses?
a. contact
b. friction
c. gravity
d. non contact
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Mr. Wang works in a recycling center. Recyclable materials arrive at the center mixed together. Workers use magnets to separate steel cans from other items. Which two statements are true about the force between a steel can and a magnet?
a. Gravity pushes the can toward the magnet.
b. The force between the can and the magnet is a noncontact force.
c. The attraction between the can and the magnet is a pull.
d. The attraction between the can and the magnet is a push.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The force that can cause or change motion of an object by touching it
Contact force
Noncontact force
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