C2 - Accelerated motion

Question 1

what is the definition of acceleration

Answer 1

the rate of change of velocity

change in velocity/time taken

Question 2

what can velocity anoints time graph show

Answer 2

the velocity and acceleration of an object

Question 3

how can you find the displacement form a v/t graph

Answer 3

the displacement will be the area under the line

Question 4

how can you use a ticker timer to work out acceleration

Answer 4

the dots will become further and further apart if the object is accelerating. can take speed every 5 dots and compare it as it goes on

Question 5

how can you use a motion sensor to work out the acceleration

Answer 5

can work out change in velocity but precision is poor as it works out velocity from its position and then calculates acceleration from these values

Question 6

how can accelerometers be used to work acceleration

Answer 6

when it accelerates a pendulum swings back but when it is at a steady speed it remains at midpoint

Question 7

what are the equations of motion

Answer 7

V=U +AT
S=UT + 0.5AT2
v2+U2+2AS
S=(U+V) /2 T

Question 8

how can you work out acceleration from a curved s/t graph/

Answer 8

draw a tangent them work out gradient of that tangent