Understanding Speed and Motion

What is the formula to calculate average speed?

• Average Speed = Total Distance / Total Time

• Average Speed = Total Distance + Total Time

• Average Speed = Distance x Time

• Average Speed = Total Time / Total Distance

If a car travels 150 km in 3 hours, what is its average speed?

• 60 km/h

• 40 km/h

• 70 km/h

• 50 km/h

Define relative speed in your own words.

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

• Relative speed is the speed of one object in relation to another.

• Relative speed is the speed of an object at rest.

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

If two trains are moving towards each other at speeds of 60 km/h and 90 km/h, what is their relative speed?

• 120 km/h

• 90 km/h

• 150 km/h

• 170 Km/h

What units are commonly used to measure speed?

• grams per second (g/s)

• joules per hour (J/h)

• liters per minute (L/min)

• meters per second (m/s), kilometers per hour (km/h), miles per hour (mph)

Convert 90 km/h to m/s.

• 30 m/s

• 20 m/s

• 25 m/s

• 15 m/s

If a cyclist travels 20 km in 1 hour and 30 minutes, what is their average speed?

• 10 km/h

• 13.33 km/h

• 15 km/h

• 20 km/h

How does the speed of an object affect the time taken to cover a distance?

• Speed has no effect on the time taken.

• Higher speed increases the distance covered.

• Slower speed results in faster travel time.

• Higher speed results in less time taken to cover a distance.

If a boat moves downstream at 15 km/h and upstream at 10 km/h, what is its average speed for the round trip?

• 14 km/h

• 11 km/h

• 13 km/h

• 12 km/h

What is the difference between speed and velocity?

• Speed is scalar; velocity is vector (includes direction).

• Speed is a type of velocity.

• Velocity measures distance only.

• Speed includes direction, while velocity does not.