Motion Flashcards
Define speed.
Speed is the distance traveled per unit time.
Define velocity.
Velocity is the change in displacement per unit time.
What is the formula for speed?
Speed = Distance ÷ Time
(𝑣 = 𝑠/𝑡)
What is the formula for average speed?
Average speed = Total distance traveled ÷ Total time taken.
Define acceleration.
Acceleration is the change in velocity per unit time.
What is the formula for acceleration?
Acceleration = Change in velocity ÷ Time taken
(𝑎 = Δ𝑣/Δ𝑡)
What is meant by uniform acceleration?
Uniform acceleration occurs when the rate of change of velocity is constant.
Give an example of uniform acceleration.
A car increasing speed steadily from 10 m/s to 20 m/s in 5 seconds.
What is meant by non-uniform acceleration?
Non-uniform acceleration occurs when the rate of change of velocity is not constant.
What is deceleration?
Deceleration is negative acceleration, where velocity decreases over time.
How can you tell if an object is at rest from a distance–time graph?
The graph is a horizontal line.
How can you determine constant speed from a speed–time graph?
The graph is a horizontal line above the time axis.
What is the value of the acceleration due to free fall near Earth’s surface?
Approximately 9.8 m/s².
How do you calculate speed from a distance–time graph?
Speed is the gradient (slope) of the graph.
How do you calculate the distance traveled from a speed–time graph?
Distance is the area under the graph.
