Paragraph: (Science-textbook/science-g3-6.txt)
Sent 1: What if two children push a swing at the same time?
Sent 2: Would the swing go higher?
Sent 3: Yes, together their force would be more.
Sent 4: It is common for forces to be combined.
Sent 5: Most objects on Earth have at least two forces acting on them.
Sent 6: Do you know what one of them is?
Sent 7: Of course, that force is gravity.
Sent 8: How many forces do you have on you right now?
Sent 9: Gravity pulls you down toward the center of Earth.
Sent 10: Your legs exert a downward force.
Sent 11: They hold you up against the pull of gravity.
Sent 12: Consider the example in Figure 1.3.
Sent 13: A book is resting on a table.
Sent 14: Gravity pulls the book downward.
Sent 15: It has a force of 20 newtons.
Sent 16: At the same time, the table pushes the book upward.
Sent 17: Its force is also 20 newtons.
Sent 18: The table opposes the pull of gravity.

Question: If two children push a swing at the same time, will the swing go higher? (false/0)

No
"Yes"

Question: What pulls you down? (false/1)

Net force
The force of gravity
Force
Gravity

Question: Does a swing go higher when two children push on it rather than just one child? (true/2)

No
Yes

Question: Is it rare for objects on Earth to have at least two forces acting on them? (false/3)

No
Yes
No. (It is common.)

Question: What forces acts on a book on a table? (true/4)

Gravity and the table
The table pulls the book upwards and the earth pulls it down
Median force
Gravity

Question: Do all objects on Earth have force? (false/5)

No
Yes
Yes, all objects have two forces and a book too has force

Question: Which forces affect a book resting on a table? (true/6)

Question: At what level of force does the table oppose gravity? (true/8)

Slightly above than 20 newtons
20 newtons
10 newtons

Question: Give two examples of combined forces action on an object (false/9)

A book on a table exerts force on the table, the table exerts force on the book
Forces cannot combine together to act on an object
A table pushes up on a book on a table, and gravity pulls down
Two children pushing a swing, book resting on a table

Question: How many forces does an object have? (true/10)

One
At least two
Two forces acting on it
3

Question: What is the unit used for force? (false/11)

Newtons
Grams

Question: What direction is the force of a table on a book that is resting on it? (false/12)

Downwards
Upwards

Question: At what level of force does gravity pull the book downwards? (true/13)

More than 20 newtons
20 newtons
10 newtons

Question: What part of one's body can hold them up against the force of gravity? (true/14)

"Legs"
Core
Arms

Question: Why would a swing go higher when two children push it at the same time? (true/15)

There is more gravity on the swing
Together, their force would be more
There is more force acting on the swing

Question: How would gravity affect a book resting on a table/ (false/16)

It wouldn't
Gravity would push down on the book
Gravity would pull the book downward
The book would be in the air
The book would lay on the table from the force exerted

Last updated: Mon Apr 16 04:55:33 EDT 2018
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