1.1 Speed

What does the speed of an object depend on?

• The distance traveled by the object
• The time taken by the object
• The speed of the observer
• The weight of the object

Which of the following is an example of objects moving in opposite directions away from each other?

• A car and a bicycle moving towards each other
• A car and a bicycle moving in the same direction
• A car and a bicycle moving away from each other
• Two cars passing each other

How do you calculate speed using distance and time?

• Speed = time / distance
• Speed = distance + time
• Speed = distance x time
• Speed = distance / time

If two cars are moving at the same speed in the same direction, what is their relative speed?

• Double the speed of each car
• Zero
• Half the speed of each car
• The sum of the speeds of each car

Which of the following is an example of objects moving in opposite directions towards each other?

• A car and a bicycle moving away from each other
• A car and a bicycle moving in the same direction
• A car and a bicycle moving towards each other
• Two cars passing each other

What is relative motion?

• The speed of an object compared to the speed of sound
• The speed of an object compared to the speed of gravity
• The speed of an object compared to the speed of the observer
• The speed of an object compared to the speed of light

How does a speed camera calculate the speed of a car?

• By measuring the distance travelled in a certain time
• By measuring the speed of the observer
• By measuring the time taken to travel a certain distance
• By measuring the acceleration of the car

What is the calculation for relative speed when objects are moving in opposite directions?

• Relative speed = speed of object 1 * speed of object 2
• Relative speed = speed of object 1 + speed of object 2
• Relative speed = speed of object 1 - speed of object 2
• Relative speed = fastest speed - slowest speed

Why do cars passing by on the motorway appear to move slowly?

• Because of their relative motion to each other
• Because of the speed of the observer
• Because their actual speeds are very high
• Because their actual speeds are very low

Which of the following is the correct formula for relative speed?

• Relative speed = speed of object 1 + speed of object 2
• Relative speed = fastest speed - slowest speed
• Relative speed = speed of object 1 - speed of object 2
• Relative speed = speed of object 1 * speed of object 2