Calculating Average Speed of an Object

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If an object returns to its initial position, what happens to its displacement?

It becomes zero (correct)

It remains the same

It decreases

It increases

Which physical quantity is described only by its numerical value?

Displacement

Magnitude

Position

Distance (correct)

In the context of the text, what is the relationship between the magnitudes of distance and displacement?

They are equal in all situations

They are always equal

They are equal only if there is no change in direction

They are not equal (correct)

In which case was the acceleration of the bicycle negative?

Second case Signup and view all the answers

Which type of motion describes acceleration being in the direction of motion?

Uniform acceleration Signup and view all the answers

When a body is in uniform acceleration?

When the velocity changes at a constant rate Signup and view all the answers

What is the acceleration of a bus that decreases its speed from 80 km h^–1 to 60 km h^–1 in 5 seconds?

-8 km s^–2 Signup and view all the answers

If a train attains a speed of 40 km h^–1 in 10 minutes with uniform acceleration, what is its acceleration?

-0.6 km s^–2 Signup and view all the answers

What is the primary method by which we perceive an object to be in motion?

Observing the change in position with time Signup and view all the answers

Why is the motion of air inferred indirectly through observing the movement of dust and leaves?

Because air cannot be directly observed Signup and view all the answers

How do passengers in a moving bus perceive the motion of roadside trees?

Moving backwards Signup and view all the answers

What is indicated by the fact that a person standing on the roadside perceives a moving bus differently from a passenger inside it?

Motion is relative Signup and view all the answers

In describing motions, what are some examples provided in the text?

Combination of straight-line and circular motion Signup and view all the answers

Why is it important to express motions through equations and graphs according to the text?

To simplify the understanding of complex motions Signup and view all the answers

What is the average speed of an object that travels 40 m in 8 s?

10 m/s Signup and view all the answers

Which term specifies both the speed and direction of an object's motion?

Velocity Signup and view all the answers

How is average velocity calculated when an object's velocity is changing at a uniform rate?

(Initial velocity + Final velocity) / 2 Signup and view all the answers

If an object is moving along a straight line with a variable speed, what quantity can express its rate of motion?

Average speed Signup and view all the answers

In the formula for average velocity, what do 'u' and 'v' represent?

Initial velocity and Final velocity Signup and view all the answers

What is the difference between speed and velocity?

Speed is a scalar quantity, while velocity is a vector quantity. Signup and view all the answers

Which part of the speed-time graph represents uniform motion of the car?

The horizontal part of the graph Signup and view all the answers

In the distance-time graph, how can you identify the object traveling the fastest?

The object with the steepest slope Signup and view all the answers

Can an object have constant acceleration but zero velocity?

Yes, because acceleration doesn't affect velocity Signup and view all the answers

For an object moving with acceleration but uniform speed, what is the acceleration affecting?

Direction only Signup and view all the answers

In what direction does an object move if it has acceleration perpendicular to its velocity?

In a curved path Signup and view all the answers

Calculate the speed of an artificial satellite moving in a circular orbit if it takes 24 hours to revolve around the Earth.

$84600 km/h$ Signup and view all the answers