A lift motor transfers 24 000J of energy in 1 minute travelling between floors. Calculate the power of the motor.

400W

Solution :

power (w) = work done (J) ÷ time(s)

x= 24000J ÷ 60s = 400W

battery with hi vtge high val resist in series

  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.