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Flashcards on Kinematics: Speed and Velocity
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What is speed?
The distance traveled per unit of time.
What is velocity?
The displacement per unit of time.
How is speed calculated?
Speed = Distance / Time
How is velocity calculated?
Velocity = Displacement / Time
What is the SI unit of speed and velocity?
m/s
What is the difference between speed and velocity?
Speed is a scalar quantity while velocity is a vector quantity. Speed only considers magnitude, while velocity considers magnitude and direction.
Can an object have constant speed but changing velocity?
Yes, if the object is changing direction while maintaining the same speed.
Can an object have constant velocity but changing speed?
No, if the velocity is constant, the speed will also be constant.
What does a straight horizontal line on a speed-time graph represent?
Constant speed.
What does a straight sloping line on a speed-time graph represent?
Constant acceleration.
Which quantity remains constant for an object moving in uniform circular motion?
Speed
If the speed of an object is halved, what happens to the time taken to travel a given distance?
The time taken is doubled.
If the velocity of an object is doubled, what happens to the displacement?
The displacement is also doubled.
In which direction does positive velocity typically point?
Positive velocity typically points in the direction of motion.
In which direction does negative velocity typically point?
Negative velocity typically points in the opposite direction of motion.
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Test Your Knowledge
What is the difference between speed and velocity?
Speed is a vector quantity while velocity is a scalar quantity.
Speed is measured in m/s while velocity is measured in km/h.
Speed is a scalar quantity while velocity is a vector quantity.
Speed measures the distance covered while velocity measures the time taken.
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How is speed calculated?
Speed = Displacement x Time
Speed = Distance / Time
Speed = Acceleration x Time
Speed = Force / Mass
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What does a straight line on a speed-time graph represent?
Constant speed
Constant acceleration
Changing speed
Changing direction
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Which of the following is a vector quantity?
Velocity
Speed
Distance
Time
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Can an object have constant acceleration but changing velocity?
Yes, if the object is changing direction while accelerating.
No, acceleration and velocity are always proportional.
No, constant acceleration means constant velocity.
Yes, if the object is changing speed while maintaining the same direction.
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What is the SI unit of speed and velocity?
km/hr
cm/s
m/s
mm/min
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If the speed of an object is doubled, what happens to the time taken to travel a given distance?
The time taken is halved.
The time taken remains the same.
The time taken is quadrupled.
The time taken is doubled.
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Which quantity remains constant for an object moving in uniform circular motion?
Speed
Velocity
Acceleration
Displacement
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If the velocity of an object is doubled, what happens to the displacement?
The displacement is halved.
The displacement remains the same.
The displacement is doubled.
The displacement is quadrupled.
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In which direction does positive velocity typically point?
Opposite to the direction of motion.
In the direction of motion.
Perpendicular to the direction of motion.
It depends on the situation.
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