G8 Friction Essentials Quiz

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Friction basics quiz

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isuru umesha

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G8 Friction Essentials Quiz


Froggy Jumps G8 Friction Essentials QuizVersión en línea Friction basics quiz por isuru umesha 1 What is the primary function of a frictional force? a To oppose the relative motion between two surfaces. b To increase the speed of a moving object. c To help objects start moving more easily. 2 In which direction does friction always act relative to an object's motion? a In the same direction as the motion. b Perpendicular to the direction of motion. c In the opposite direction to the motion. 3 What is "static friction"? a Friction acting on bodies that are in constant motion. b The force that causes an object to suddenly accelerate. c The frictional force exerted on a body before its motion starts. 4 How does static friction behave when the applied external force increases, but the object remains stationary? a It decreases to allow the object to eventually move. b It automatically increases to balance the applied force. c It stays at a constant fixed value regardless of the applied force. 5 Which term describes the maximum frictional force between two surfaces just as motion is about to begin? a Normal reaction b Limiting frictional force c Dynamic friction 6 According to Activity 2, how does surface roughness affect the limiting frictional force? a The limiting frictional force increases as the roughness increases. b Roughness has no measurable effect on the limiting frictional force. c The limiting frictional force decreases as the roughness increases. 7 How does the contact surface area affect the limiting frictional force? a A smaller surface area significantly increases the limiting frictional force. b A larger surface area results in a higher limiting frictional force. c The limiting frictional force does not depend on the surface area. 8 If you increase the weight of an object (thereby increasing the normal reaction), what happens to the limiting frictional force? a It increases. b It decreases because the object becomes harder to push. c It remains the same as long as the surfaces don't change. 9 Which of the following is a common method used to reduce friction in machinery? a Making the contact surfaces rougher. b Applying lubricants such as oil, grease, or graphite. c Increasing the normal reaction between moving parts. 10 Which is a mentioned benefit of friction in the sources? a It causes machine parts to heat up and lose energy. b It allows us to walk on a surface without slipping. c It causes the tires of vehicles to wear out over time.

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G8 Friction Essentials Quiz

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G8 Friction Essentials QuizVersión en línea

por isuru umesha

What is the primary function of a frictional force?

In which direction does friction always act relative to an object's motion?

What is "static friction"?

How does static friction behave when the applied external force increases, but the object remains stationary?

Which term describes the maximum frictional force between two surfaces just as motion is about to begin?

According to Activity 2, how does surface roughness affect the limiting frictional force?

How does the contact surface area affect the limiting frictional force?

If you increase the weight of an object (thereby increasing the normal reaction), what happens to the limiting frictional force?

Which of the following is a common method used to reduce friction in machinery?

Which is a mentioned benefit of friction in the sources?