Kinematics - 2
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1
Distance vs displacement
Distance is the total length of travel by a moving object vs displacement which is the distance moved in a particular direction. It is a measure of change in position
2
What is the distance and displacement respectively
46m and -6m
3
What is the formula for average speed
$\frac{Total \space distance}{total \space time \space taken}$
4
What is instantaneous speed
Speed of an object at a particular moment in time
5
What is the formula for instantaneous speed
$\frac{Distance \space travelled}{time \space taken}$
6
Speed vs velocity
Speed is the distance moved per unit time vs velocity which is the rate of change of displacement
7
What is the formula for average and instantaneous velocity
$\frac{Total \space Displacement}{Total \space Time \space Taken} \space and \space \frac{Displacement}{Time \space Taken}$
8
What is acceleration
It is the rate of change of velocity
9
What is the formula for acceleraton
$\frac{v - u}{t}$ where v is final velocity and u is initial speed SI Unit: $m/s^2$
10
When the acceleration is negative the deceleration is?
Positive
11
What are 3 possible scenarios that an object will undergo acceleration
When an there is a change in speed and / or direction
12
How to convert seconds to hours
Time in seconds / 3600
13
What does the gradient in a distance time graph give
Speed
14
What is the SLAP framework for plotting graphs
Scale - eg 1cm rep 10m, Line - Smoothness, Axis - Unit, Point - Plotting
15
When gradient in a distance time graph is constant, increasing and decreasing, the speed is?
Constant / uniform, increasing, decreasing
16
What does the gradient in displacement-time graph give?
Intantaneous velocity
17
How to calculate gradient of a displacement time graph
$\frac{displacement}{time}$
18
what does negative gradient mean in a displacement time graph
It means the object is moving in the opposite direction
19
When will an object be in free fall
If it only experiences gravitational force or weight without air resistance
20
What is the g = on earth
$10m/s^{-2}$
21
When an object is in free fall, how much speed does it gain every second on earth
10m/s
22
What does the graph of an object that is dropped from rest look like
A = displacement = height of ball
23
What does the graph of an object thrown vertically upward until it reaches the highest point look like
A = displacement = height
24
What does the graph of an object thrown vertically upward and fall back to the point of release look like
Area A = Area B = displacement = height
25
What does the graph of an object thrown vertically upward from a point and fall past the point of release look like
Downward Distance > Upward Distance or B > A. height below point of release = B - A
26
What does the graph of an object dropped from rest at a certain height and bounce upward look like
Downward Distance > Upward Distance or A > B, rebound height is lower