26 Questions
If an object returns to its initial position, what happens to its displacement?
It becomes zero
Which physical quantity is described only by its numerical value?
Distance
In the context of the text, what is the relationship between the magnitudes of distance and displacement?
They are not equal
In which case was the acceleration of the bicycle negative?
Second case
Which type of motion describes acceleration being in the direction of motion?
Uniform acceleration
When a body is in uniform acceleration?
When the velocity changes at a constant rate
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
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
What is the primary method by which we perceive an object to be in motion?
Observing the change in position with time
Why is the motion of air inferred indirectly through observing the movement of dust and leaves?
Because air cannot be directly observed
How do passengers in a moving bus perceive the motion of roadside trees?
Moving backwards
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
In describing motions, what are some examples provided in the text?
Combination of straight-line and circular motion
Why is it important to express motions through equations and graphs according to the text?
To simplify the understanding of complex motions
What is the average speed of an object that travels 40 m in 8 s?
10 m/s
Which term specifies both the speed and direction of an object's motion?
Velocity
How is average velocity calculated when an object's velocity is changing at a uniform rate?
(Initial velocity + Final velocity) / 2
If an object is moving along a straight line with a variable speed, what quantity can express its rate of motion?
Average speed
In the formula for average velocity, what do 'u' and 'v' represent?
Initial velocity and Final velocity
What is the difference between speed and velocity?
Speed is a scalar quantity, while velocity is a vector quantity.
Which part of the speed-time graph represents uniform motion of the car?
The horizontal part of the graph
In the distance-time graph, how can you identify the object traveling the fastest?
The object with the steepest slope
Can an object have constant acceleration but zero velocity?
Yes, because acceleration doesn't affect velocity
For an object moving with acceleration but uniform speed, what is the acceleration affecting?
Direction only
In what direction does an object move if it has acceleration perpendicular to its velocity?
In a curved path
Calculate the speed of an artificial satellite moving in a circular orbit if it takes 24 hours to revolve around the Earth.
$84600 km/h$
This quiz covers the concept of calculating average speed of an object using the formula: Average speed = Total distance travelled / Total time taken. An example problem is provided for better understanding.
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