Bike Race Problem: Solving for Applied Force, Work, Power & Acceleration

[green123]

Homework Statement

Contador climbs a 5 degree section of road for 8.2 km to the summit in 20 minutes 35 seconds. he is 62kg?
his bike is 8kg and the resistance force is 21 N
What is the applied force needed for contador to move at constant speed?
what is the work done to reach the summit?
how much power does contador generate per kilogram of body mass?
how much additional force is needed if contador accelerates at a rate of .62 m/s^2 for the last 25 seconds?
with what velocity does he finish the race based on this acceleration?

Homework Equations

ke= .5 mv^2
pe=mgh
work=fd
power= delta E/time

The Attempt at a Solution

 

[Mark44]

Homework Statement

Contador climbs a 5 degree section of road for 8.2 km to the summit in 20 minutes 35 seconds. he is 62kg?
his bike is 8kg and the resistance force is 21 N
What is the applied force needed for contador to move at constant speed?
what is the work done to reach the summit?
how much power does contador generate per kilogram of body mass?
how much additional force is needed if contador accelerates at a rate of .62 m/s^2 for the last 25 seconds?
with what velocity does he finish the race based on this acceleration?

Homework Equations

ke= .5 mv^2
pe=mgh
work=fd
power= delta E/time

The Attempt at a Solution

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