Speed, Velocity, Acceleration

What is the definition of speed?

• Speed is the color of an object.

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

• Speed is the weight of an object.

• Speed is the temperature of an object.

Explain the difference between speed and velocity.

• Speed is the magnitude of velocity.

• Velocity is the rate of change of position.

• Speed is a vector quantity.

• Velocity is a scalar quantity.

How do you calculate average velocity?

• Average velocity = Total distance / Total time

• Average velocity = Total speed / Total time

• Average velocity = Total displacement * Total time

• Average velocity = Total displacement / Total time

What is acceleration and how is it different from velocity?

• Acceleration is the rate of change of velocity over time, while velocity is the rate of change of position over time.

• Acceleration is the speed of an object, while velocity is its position.

• Acceleration is the same as velocity, just in a different direction.

• Acceleration is a scalar quantity, while velocity is a vector quantity.

Provide real-life examples of acceleration.

• Car speeding up, ball falling due to gravity, rocket launching into space

• Train accelerating uphill, elevator moving downward, bicycle slowing down

Define speed in terms of distance and time.

• Speed = Distance x Time

• Speed = Time / Distance

• Speed = Distance + Time

• Speed = Distance / Time

Give an example where speed and velocity are the same.

• A car moving north at a speed of 60 km/h has a velocity of 60 km/h north.

• A plane flying at 500 km/h has a velocity of 500 km/h up.

• A train moving at 100 km/h has a velocity of 100 km/h east.

• A person walking at 5 km/h has a velocity of 5 km/h south.

If an object is moving with a constant velocity of 20 m/s, what is its average velocity over a 10-second interval?

• 15 m/s

• 10 m/s

• 20 m/s

• 25 m/s

How is acceleration calculated?

• acceleration = (final velocity - initial velocity) / time

• acceleration = initial velocity / time

• acceleration = (final velocity + initial velocity) / time

• acceleration = final velocity / time

Explain the concept of negative acceleration with an example.

• Negative acceleration is the rate at which an object speeds up.

• Negative acceleration is the rate at which an object slows down. For example, when a car decelerates to stop at a traffic light, it experiences negative acceleration.

• Negative acceleration is only applicable to objects moving upwards.

• Negative acceleration occurs when an object maintains a constant speed.