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Online Quiz (Worksheet A B C D)

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Upper Elementary Science - II
4.13 Friction

Friction is a force that happens when two bodies rub against each other. Friction is higher when the surfaces are very rough. Friction is a slowing force and is a kind of resistance to motion of objects.

Friction can be classified as:

  • Static Friction
  • Kinetic friction
Static friction: The friction acting on a body at rest. The force being applied on a body is usually referred to as static friction.

Kinetic friction: The friction on a body that is moving is called kinetic friction.
Friction occurs among all states of matter.


Directions: Answer the following questions.
Q 1: On which of these surfaces will a toy slope down easily
Polished floor
Carpet
A rough wall

Q 2: You are able to sit on a slope without sliding. What stops you from sliding down
Gravity
Force
Weight
Friction

Q 3: Friction occurs only among solids
True
False

Q 4: Which of these is a method to reduce friction
Applying grit
Oiling the door hinges
Using checked surfaces

Q 5: Resistance is a type of friction
False
True

Q 6: If you scrape a smooth surface the friction would
Increase
Decrease
Remain the same

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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