Chapter 10 Force And Motion - Year 1 Flashcards
Describe a displacement time graph?
Time is on the x axis
Displacement is on the y axis
A horizontal line represents that the particle is stationary
The gradient represents the velocity
A downwards sloping line represents the particle traveling back towards the starting point
A curved line represents acceleration or deceleration
Average velocity =
Distance from the starting point / time taken
Average speed =
Total distance traveled / time taken
Describe a velocity time graph
Time is on the x axis
Velocity is on the y axis
A horizontal line indicates that the particle is moving at a constant velocity
The gradient represents the acceleration
A downwards sloping line represent that the particle is slowing down at a constant rate
The area under the graph represents the displacement
What needs to be true for suvat equations to be used?
CONSTANT ACCELERATION
What is the first constant acceleration suvat equation?
v=u+at
What is the second constant acceleration suvat equation?
s=ut+1/2at^2
What is the third constant acceleration suvat equation?
s=vt-1/2at^2
What is the forth constant acceleration suvat equation?
v^2=u^2+2as
What is the fith constant acceleration suvat equation?
s=1/2(u+v)t
What is the value of gravity?
9.8 ms^-2
If a ball is falling what is it’s acceleration?
-9.8ms^2
Which force acts upwards?
R (reaction force)
Which force acts downwards?
W (weight)
What force acts to the right?
P (pull)
Which force acts to the left?
F (friction)
What is newtons first law of motion?
An object at rest will stay at rest and an object with constant velocity will remain at the velocity unless an unbalanced force acts on the object
What is a easy way to remember newtons first law?
If the object isn’t accelerating the forces are balanced in every direction
What is newtons second law of motion?
F=ma
(Where f and a act in the same direction)
Weight =
W=mg
What is true if a vector is parallel to the j vector?
It will have no i component
What is true if a vector is parallel to the i vector?
It will have no j component
What does F stand for?
Resultant force / force
What can you do if the connected system involves the motion of more than one particle?
You can consider the particles separately
