Acyclist intends to cycle up a 7.70o hill whose vertical height is 126m. assuming the mass of bicycle plus person is 75.0kg, calculate how much work must be done against gravity. if each complete revolution of the pedals moves the bike 5.12m along its path, calculate the average force that must be exerted on the pedals tangent to their circular path. neglect work done by friction and other losses. the pedals turn in a circle of diameter 38.8cm.

92704.5 J

596.44737 N

Explanation:

m = Mass of person + bicycle = 75 kg

g = Acceleration due to gravity = 9.81 m/s²

h = Vertical height = 126 m

= Angle = 7.7°

d = Diameter = 0.388 m

Work done against gravity is given by

Work done is 92704.5 J

Force required is given by

The force is 596.44737 N

a, c, d, e are all applying about success strategies.

  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.