uzzelfritzypoblete
Answered

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1. What is produced when two surfaces rub against each other?

A. air B. pressure C. motion D. friction

2. Which surface increases friction?

A. polished B. rough C. lubricated D. shiny

3. What causes falling objects to fall?

A. speed B. gravity C. acceleration D. wind

4. Which surface decreases friction?

A. smooth B. rugged C. rough D. rocky

5. Why do you move faster when running down a hill?

A. Gravity pulls you up. C. Gravity pulls you down.

B. Wind pushes you back. D. Wind pulls you.​

Sagot :

Blinks2009

Answer:

1. What is produced when two surfaces rub against each other?

A. air B. pressure C. motion D. friction

2. Which surface increases friction?

A. polished B. rough C. lubricated D. shiny

3. What causes falling objects to fall?

A. speed B. gravity C. acceleration D. wind

4. Which surface decreases friction?

A. smooth B. rugged C. rough D. rocky

5. Why do you move faster when running down a hill?

A. Gravity pulls you up. C. Gravity pulls you down.

B. Wind pushes you back. D. Wind pulls you.

#CarryOnLearning

axcellelumantao07

Answer:

1.D

2.B

3.B

4.A

5.C

Explanation:

1.Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.

2.Rougher surfaces have more friction between them than smoother surfaces. That's why we put sand on icy sidewalks and roads. You can't slide as far across ice with shoes as you can on the blades of skates (see Figure below). The rougher surface of the soles of the shoes causes more friction and slows you down.

3.The force of gravity causes objects to fall toward the center of Earth. The acceleration of free-falling objects is therefore called the acceleration due to gravity. ... The direction of the acceleration due to gravity is downward (towards the center of Earth).

5.The answer is Gravity. Gravity is a constant force acting on everything surrounding a massive object. ... The more mass either object has, the faster they meet. In the case of driving down a hill, the objects are the Earth, and you on a car.

[tex]#CarryOnLearning[/tex]

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