Physics Class 10: Forces and Motion

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Questions and Answers

What is the unit of measurement for force?

  • Newton (correct)
  • Newton per second
  • Newton metre
  • Meter

What happens to the resultant force when forces are balanced?

  • It increases
  • It remains constant
  • It decreases
  • It is zero (correct)

Which formula represents speed?

  • S = T/D
  • S = D x T
  • S = D + T
  • S = D/T (correct)

In a distance-time graph, what does a descending line indicate?

<p>The object is losing distance (C)</p> Signup and view all the answers

How is the moment calculated?

<p>Distance multiplied by force (C)</p> Signup and view all the answers

What is the equation used to calculate speed?

<p>speed = distance/time (C)</p> Signup and view all the answers

Which of the following statements about the speed of light and sound is true?

<p>Light travels at approximately 300,000 km/s. (B)</p> Signup and view all the answers

How does the height of a ramp affect the speed of an object at the bottom?

<p>The higher the ramp, the faster the object's speed. (B)</p> Signup and view all the answers

What is the speed of sound in air?

<p>340 m/s (D)</p> Signup and view all the answers

What is the relationship between speed and velocity?

<p>Velocity combines speed with the direction of motion. (A)</p> Signup and view all the answers

Flashcards

Force

A push or pull that can change an object's motion.

Speed

The measurement of how quickly an object moves over a certain distance.

Velocity

A force that acts in a specific direction, like moving forward or backward.

Moment

The turning effect of a force around a fixed point (pivot).

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Balanced Forces

When forces balance each other out, resulting in no net change in motion.

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What is speed?

The speed of something is measured by how far it travels in a fixed amount of time.

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Metric vs. Imperial Speed Units

The metric system uses meters per second (m/s) to measure speed, while the imperial system uses miles per hour (mph).

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How does ramp height affect speed?

The higher the ramp, the faster the object's speed at the bottom because its stored gravitational potential energy transforms into kinetic energy as it moves down.

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Light vs. Sound Speed

Light travels much faster than sound. Light travels at approximately 300,000 km/s, while sound travels at 340 m/s.

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How to calculate a Moment

Moments are calculated by multiplying force by the distance from the pivot point: moment = force × distance.

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