krystal085
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1. What is sliding friction?
A. It occurs between two surfaces that come in contact with each other.
B. It occurs in stationary objects or objects at rest.
C. It occurs between moving objects and a liquid or between an object moving in the air.
D. It opposes the motion of the wheel turning along a surface.
2. What type of friction occurs when there is more force needed to travel an object in a surface
than rolling Friction?
A. Static Friction C. Sliding Friction
B. Fluid Friction D. Air friction
3. The following statements are examples of sliding friction EXCEPT ONE. Which is it?
A. A block being slid across the floor C. A glass being pushed across the table
B. Jeans on your legs when putting it on D. When a train goes around
4. Which type of friction opposes the sliding of objects over a surface?
A. Static Friction C. Fluid Friction
B. Sliding Friction D. Rolling Friction
5. Mucus produced by snails, help them move along the ground. How does the mucus help
snails move?
A. Mucus is cold. C. Mucus reduces friction.
B. Mucus leaves a trail. D. Mucus makes the snail lighter.
6. Ballet dancers usually applied rosin powder on their shoes to increase _________ .
A. their weight C. the gravity
B. their speed D. friction
7. When a certain object slides over another, the frictional force undergo by that object is known
as ________ friction.
A. Sliding B. Static C. Rolling D. None of the mentioned

8. What is the main reason why do players in the basketball game use spikes in their shoes?
A. To reduce friction between the floor and shoes C. To increase the weight of the players
B. To increase friction between two surfaces D. To decrease the gravity of the players
9. It is difficult to walk and even run in a smooth surface due to ____________ .
A. more friction C. absolute friction
B. no friction at all D. less friction
10. Which of the following statement is an example of sliding friction?
A. A car that eventually stop C. When the card is being slid into the envelop
B. A soccer ball kicked across the field D. A train goes around the curve
fast please

Sagot :

smartboard

SCIENCE

Friction

1. A. It occurs between two surfaces that come in contact with each other.

Sliding friction occurs when two surfaces are sliding or in contact with each other.

2. A. Static Friction

Static friction is the strongest friction among all of frictions.

3. D. When a train goes around.

It is an example of static friction.

4. B. Sliding Friction

It is believed to opposed the objects being slide on an object. Another term for sliding friction is kinetic friction.

5. C. Mucus reduces friction.

Because of the mucus, snails slide on that liquid.

6. D. Friction

Rosin powder is effective for increasing of friction, to prevent from falling when ballerinas will dance.

7. A. Sliding Friction

Clue phrase: slides over another

8. A, To reduce friction between the floor and shoes.

It is the same to ballerinas.

9. D. Less friction

It has more tendency of sliding on the ground.

10. C. When the card is being slid into the envelope.

Clue word: slid

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