1.1 Flashcards
What is a scalar?
a quantity that requires only size
Give 6 examples of scalars
speed, time, distance, mass, energy, temperature
What is a vector?
a quantity that requires size and direction
Give 6 examples of vectors
force, velocity, displacement, acceleration, weight, momentum
Break down v = u + at
v = final velocity (ms^-1)
u = initial velocity (ms^-1)
a = acceleration (ms^-2)
t = time (s)
Break down s = ut + 1/2at^2
s = displacement (m)
u = intial velocity (ms^-1)
t = time (s)
a = acceleration (ms^-2)
Give an equation to calculate final velocity when only given intial velocity, acceleration and displacement
v^2 = u^2 + 2as
Give an equation to calculate displacement when only given intial velocity, final velocity and time
s = 1/2(u + v)t
An object is thrown vertically in the air. What is the final velocity and acceleration of the object when it reaches its maximum height?
final velocity (v) = 0ms-1
acceleration (a) = -9.8ms-2
Plot the line showing the vertical motion of a ball thrown upwards on a velocity-time graph
a straight line going down hill
Plot a line on a acceleration-time graph which shows the vertical motion of a ball
a line beneath the time axis
Plot a line on a velocity-time graph which shows the vertical motion of a ball being dropped and bouncing multiple times
starts below the time axis, goes up then down, gradually getting smaller
How do you calculate acceleration from a velocity-time graph?
calculate the gradient of the line
change in velocity/change in time
How do you calculate displacement from a velocity-time graph?
calculate the area under the graph
How do you calculate velocity from a displacement-time graph?
calculate the gradient of the line
change in displacement/change in time
