P2
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What’s the word equation for speed?
Speed = distance ÷ time
What’s the symbol equation for speed?
V = s÷t
What’s the definiton of acceleration?
The measure of how much the velocity changes by in a given time
What’s the word equation for acceleration?
Acceleration = change in velocity ÷ time taken
What’s the symbol equation for acceleration?
V-u÷t
What’s the unit for acceleration?
M/s²
What’s the equation for displacement?
Final position - initial position
What does a flat line show on a distance graph?
No movement
How do you work out gradient?
Rise ÷ run Change in y ÷ change in x
Where is an objects speed found on on a distance time graph?
Gradient
What does a diagonally up line mean on a distance time graph?
Acceleration
What is a scalar?
A quantity described by size but not direction
What’s a vector?
A quantity described by size and direction
What is acceleration?
The measure of how much velocity changes by in a given time
What’s the difference between acceleration and velocity?
Velocity describes how fast an object is going, acceleration is the rate of change in the object over time
Scalar
Magntiude
Vector
Magnitude and direction
What does accuracy mean?
How close to the real answer your results are
What does precision mean?
How close your results are to each other
How do you find speed on a distance time graph?
Find the tangent to find the gradient
What happens to kinetic energy if velocity doubles
It quadruples
How do you work out force?
Mass × acceleration
If the resultant force of an object is 0 newton’s what is the acceleration?
0 m/s²
Why is the earth constantly accelerating?
Because it’s direction is constantly changing which makes it accelerate