Speed of Motion

Click on the flashcard to see the answer



What is the definition of speed in motion?

Speed is the distance traveled per unit of time.

Which equation is used to calculate speed?

Speed = Distance / Time.

What are the SI units for speed?

The SI unit for speed is meters per second (m/s).

How does speed differ from velocity?

Speed is a scalar quantity indicating how fast an object is moving, while velocity is a vector that describes the speed and direction of motion.

What does constant speed mean in terms of motion?

Constant speed means that an object covers equal distances in equal intervals of time.

What is average speed?

Average speed is the total distance traveled divided by the total time taken.

How is instantaneous speed different from average speed?

Instantaneous speed is the speed of an object at a particular moment, while average speed is measured over a total trip.

What happens to speed in uniform circular motion?

In uniform circular motion, speed remains constant, but the direction changes continuously.

What is the speed of light in a vacuum?

The speed of light in a vacuum is approximately 299,792,458 meters per second.

How does speed affect kinetic energy?

Kinetic energy increases with the square of speed, meaning if the speed doubles, the kinetic energy increases by four times.

What impact does friction have on speed during motion?

Friction opposes motion, which can reduce the speed of an object.

How do you calculate the speed of a car that traveled 150 km in 3 hours?

Speed = Distance / Time = 150 km / 3 hours = 50 km/h.

What is non-uniform speed?

Non-uniform speed occurs when an object covers unequal distances in equal intervals of time.

In a distance-time graph, what does a steeper slope indicate?

A steeper slope indicates a higher speed.

What is the relationship between speed and velocity in straight-line motion?

In straight-line motion, speed and the magnitude of velocity are the same.




Test Your Knowledge

Select the correct option


1. What is the definition of speed in motion?

Speed is the rate of change of velocity.

Speed is the amount of matter in an object.

Speed is the distance traveled per unit of time.

Speed is the time taken for one complete revolution.

2. Which equation is used to calculate speed?

Distance = Speed / Time.

Speed = Distance / Time.

Time = Distance * Speed.

Speed = Time / Distance.

3. What are the SI units for speed?

Kilometers per hour (km/h).

Feet per second (ft/s).

Meters per second (m/s).

Miles per hour (mph).

4. How does speed differ from velocity?

Speed is scalar and velocity is a vector indicating direction.

Speed and velocity are the same; both are vectors.

Speed is a vector, velocity is scalar.

Speed considers direction, velocity does not.

5. What does constant speed mean in terms of motion?

An object covers equal distances in equal intervals of time.

An object is accelerating uniformly.

An object has zero velocity.

An object moves faster as time progresses.

6. What is average speed?

The speed an object has at a specific moment.

Total distance traveled divided by total time taken.

The speed measured over a short distance.

Speed measured using a speedometer.

7. How is instantaneous speed different from average speed?

Instantaneous speed is calculated over a long journey.

Instantaneous speed is at a moment; average is over a trip.

Both are the same in constant speed.

Average speed is always higher than instantaneous speed.

8. What happens to speed in uniform circular motion?

Speed increases linearly.

Speed remains constant, direction changes continuously.

Speed decreases due to changing path.

Both speed and direction remain constant.

9. What is the speed of light in a vacuum?

Approximately 299,792,458 meters per second.

Approximately 186,000 miles per second.

100,000 kilometers per second.

299,792 kilometers per second.

10. How does speed affect kinetic energy?

Kinetic energy is independent of speed.

Kinetic energy increases with the square of speed.

Kinetic energy decreases as speed increases.

Kinetic energy is directly proportional to speed.

11. What impact does friction have on speed during motion?

Friction opposes motion, reducing speed.

Friction increases speed by adding energy.

Friction only affects acceleration, not speed.

Friction does not impact speed.

12. How do you calculate the speed of a car that traveled 150 km in 3 hours?

Speed = Distance * Time = 150 km * 3 hours = 450 km/h.

Speed = Distance / Time = 50 km * 3 hours = 150 km/h.

Speed = Distance / Time = 150 km / 3 hours = 50 km/h.

Speed = Time / Distance = 3 hours / 150 km = 0.02 km/h.

13. What is non-uniform speed?

Speed achieved under uniform motion conditions.

When an object maintains a constant speed.

Object covers unequal distances in equal intervals.

When an object has acceleration equal to zero.

14. In a distance-time graph, what does a steeper slope indicate?

Object is moving at a lower speed.

A higher speed.

The time of travel increases.

No motion at all.

15. What is the relationship between speed and velocity in straight-line motion?

Speed is always half of the velocity.

Speed and magnitude of velocity are the same.

Velocity is double the rate of speed.

There is no relation between speed and velocity.