physics - kinematics Flashcards
(47 cards)
What is kinematics?
Kinematics is the branch of mechanics that deals with the motion of objects without considering the forces that cause the motion.
What is the formula for speed?
Speed is calculated using the formula: Speed = Distance / Time.
True or False: Velocity is the same as speed.
False: Velocity includes direction, while speed does not.
What is the difference between distance and displacement?
Distance is the total path length traveled, while displacement is the shortest straight line from the initial to the final position.
Fill in the blank: The unit of speed in the International System of Units (SI) is ______.
meters per second (m/s)
What does a speed-time graph represent?
A speed-time graph represents how speed changes over time.
What is the formula for calculating acceleration?
Acceleration = (Final Velocity - Initial Velocity) / Time.
True or False: Acceleration can be positive or negative.
True: Positive acceleration indicates an increase in speed, while negative acceleration (deceleration) indicates a decrease.
What is the unit of acceleration?
The unit of acceleration is meters per second squared (m/s²).
If a car travels 100 meters in 5 seconds, what is its speed?
The speed is 20 meters per second (m/s).
What is uniform motion?
Uniform motion is when an object moves at a constant speed in a straight line.
Fill in the blank: The slope of a distance-time graph represents ______.
speed
What do we call the change in position of an object?
We call it displacement.
If an object moves 30 meters east and then 40 meters west, what is its displacement?
The displacement is 10 meters west.
Multiple choice: Which of the following is a vector quantity? A) Speed B) Distance C) Velocity D) Time
C) Velocity
What does a zero slope on a distance-time graph indicate?
A zero slope indicates that the object is at rest.
What is the significance of the area under a speed-time graph?
The area under a speed-time graph represents the distance traveled.
If a cyclist accelerates from 5 m/s to 15 m/s in 5 seconds, what is the acceleration?
The acceleration is 2 m/s².
What would be the final velocity of an object that starts at 0 m/s and accelerates at 3 m/s² for 4 seconds?
The final velocity would be 12 m/s.
Multiple choice: Which of the following describes an object that is accelerating? A) Moving at a constant speed B) Changing speed C) Moving in a straight line D) All of the above
B) Changing speed
If a runner covers a distance of 400 meters in 50 seconds, what is their average speed?
The average speed is 8 m/s.
Define speed.
Speed is the distance covered by unit time.
Define acceleration.
Acceleration is how quickly the speed and direction is changing.
Define velocity.
Velocity describes the speed and direction e.g 10m/s North.
