Answered: A 60-kg jogger runs up a long flight of… | bartleby

Related questions

Question

A 60-kg jogger runs up a long flight of stairs in 4.0 s. The vertical height of the
stairs is 4.5 m. (a) Estimate the jogger's power output in watts and horsepower.
(b) How much energy did this require?

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Blurred answer

Similar questions

What average mechanical power (in W) must a 60.0 kg mountain climber generate to climb to the summit of a hill of height 365 m in 49.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body. HINT
A motorcyclist drives up a 3.1-meter tall ramp and leaves the ramp with a speed of 42.5 m/s. If his speed is 37.8 m/s when he reaches the peak of his path, what is the maximum height (in m) above ground that he reaches? (Use energy, not kinematic equations.)
A skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 80 m up a 30° slope (assumed frictionless) at a constant speed of 2.9 m/s? KJ (b) What power (expressed in hp) must a motor have to perform this task? hp
A fuel-powered loader raises a 2.2 x 103-kg load from the ground to a loading platform, which is 2.7 m above the ground. Theloader consumes 1.5 X 105 J of energy from the fuel while raising the load. (a) Determine the work done by the loader on theload. (b) Calculate the efficiency of the loader.
A skier of mass 77 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull hìm 45 m up a 30° slope (assumed frictionless) at a constant speed of 1.9 m/s? kJ (b) What power (expressed in hp) must a motor have to perform this task? hp
Suppose a 975-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). (a) How long, in seconds, will it take the car to reach a speed of 15.5 m/s, neglecting friction. (b) How long, in seconds, will this acceleration take if the car also climbs a 2.9-m high hill in the process?
What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit of a hill of height 405 m in 46.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body.
(a) How long (in s) will it take an 865 kg car with a useful power output of 38.0 hp (1 hp = 746 W) to reach a speed of 13.0 m/s, neglecting friction? (Assume the car starts from rest.) 2.88 X S
(a) How long (in s) will it take an 855 kg car with a useful power output of 36.0 hp (1 hp = 746 W) to reach a speed of 13.0 m/s, neglecting friction? (Assume the car starts from rest.) (b) How long (in s) will this acceleration take if the car also climbs a 2.80 m-high hill in the process? Additional Materials O Reading
(a) How long (in s) would it take a 1.50 x 10° kg airplane with engines that produce of 100 MW of power to reach a speed of 200 m/s and an altitude of 12.0 km if air resistance were negligible? (b) If it actually takes 950 s, what is the power applied, in megawatts? MW (c) Given this power, what is the average force (in kN) of air resistance if the airplane takes 1200 s? (Hint: You must find the distance the plane travels in 1200 s assuming constant acceleration.) kN