A driver wishes to buy a new car. The table below gives some data about an electric car and one with a petrol engine.
Electric car
Petrol engine car
Cost (£)
27 000
15 000
Running cost per year (£)
250
2 000
Average lifetime (years)
12
12
Which car would be the most economic over its 12 year lifetime?
Use data from the table above to support your answer.
You should include the difference in cost in your answer.

no. dot product   =0 when vecs at right angles

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards