2F - 2. Describing Motion

What is the primary purpose of traffic cameras on highways?

• To take pictures of drivers

• To monitor traffic flow and speed

• To provide entertainment for passengers

• To collect tolls from vehicles

What does a speedometer measure?

• The distance traveled

• The fuel efficiency

• The speed of the vehicle

• The time taken for a journey

What is the formula for calculating speed?

• speed = distance + time

• speed = distance × time

• speed = distance / time

• speed = time / distance

What unit is commonly used to express speed in physics?

• Kilometers per hour (km/h)

• All of the above

• Metres per second (m/s)

• Miles per hour (mph)

What does acceleration measure?

• The distance covered by an object

• The change in speed over time

• The initial speed of an object

• The total time taken for a journey

What is the acceleration due to gravity near the Earth's surface?

• 9.81 m/s²

• 10 m/s²

• 9.8 m/s²

• 8.5 m/s²

What does a distance-time graph represent?

• The acceleration of an object

• The speed of an object

• The total distance traveled

• The time taken for a journey

In a speed-time graph, what does the gradient represent?

• The time taken

• The acceleration of the object

• The speed of the object

• The distance traveled

What happens to an object that is decelerating?

• Its speed is decreasing

• Its speed is constant

• Its speed is zero

• Its speed is increasing

What is the formula for calculating acceleration?

• acceleration = change in speed / change in time

• acceleration = distance / speed

• acceleration = change in distance / change in time

• acceleration = speed / time