Speed and Relative Speed

What is the definition of speed?

• Speed is the rate at which an object covers distance.

• Speed is the time taken to travel a distance.

• Speed is the mass of an object divided by its volume.

• Speed is the force applied to an object.

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How do you calculate average speed?

• Average Speed = Total Distance / Total Time

• Average Speed = Total Time / Total Distance

• Average Speed = Distance x Time

• Average Speed = Total Distance + Total Time

If a car travels 100 km in 2 hours, what is its average speed?

• 25 km/h

• 100 km/h

• 50 km/h

• 75 km/h

What is the formula for calculating speed?

• Speed = Distance - Time

• Speed = Distance / Time

• Speed = Distance + Time

• Speed = Time / Distance

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Explain the concept of relative speed.

• Relative speed is the speed of an object measured from the ground.

• Relative speed is the average speed of multiple objects combined.

• Relative speed is the speed of an object in a vacuum.

• Relative speed is the speed of one object as observed from another object.

If two trains are moving towards each other at 60 km/h and 40 km/h, what is their relative speed?

• 100 km/h

• 50 km/h

• 120 km/h

• 80 km/h

How does the direction of movement affect relative speed?

• Relative speed is always constant regardless of direction.

• Direction of movement has no impact on speed calculations.

• Relative speed is only affected by the distance between objects.

• The direction of movement affects relative speed by determining whether speeds add (towards each other) or subtract (same direction).

If a cyclist travels at 15 km/h and a runner at 10 km/h, what is their relative speed if they are moving in the same direction?

• 25 km/h

• 15 km/h

• 10 km/h

• 5 km/h

What happens to relative speed if two objects are moving in opposite directions?

• The relative speed increases and is the sum of their speeds.

• The relative speed is zero since they are moving in opposite directions.

• The relative speed decreases and is the difference of their speeds.

• The relative speed remains constant regardless of direction.

Why is understanding relative speed important in real-life scenarios?

• It is important for planning travel, ensuring safety, and optimizing logistics.

• It is crucial for learning mathematics.

• It is only relevant for theoretical physics.

• It helps in understanding historical events.

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