In 2.0 minutes, a ski lift raises 4 skiers at constant speed to a height of...
_____________ W
Homework Answers
Watts is Joules per second
Joules are kg m/s^2
2.0 min = 120 s
Work is force times distance in the direction of the force.
Force is gravity times mass
F = mg
Fd = mgd
P =mgd/t = 4*65kg*(9.8m/s^2)*115m/120s
P = 2440 W
wwwwww 11. In 2.0 minutes, a ski lift raises four skiers at constant speed to a height of 140 m. The average mass of each sker is 65 kg. What is the average power provided by the tension in the cable pulling the lift? 11. In 2.0 minutes, a ski lift raises four skiers at constant speed to a height of 140 m. The average mass of each sker is 65 kg. What is the average power provided by the tension in the cable pulling the lift? 11. In 2.0 minutes, a ski lift raises four skiers at constant speed to a height of 140 m. The average mass of each sker is 65 kg. What is the average power provided by the tension in the cable pulling the lift? 11. In 2.0 minutes, a ski lift raises four skiers at constant speed to a height of 140 m. The average mass of each sker is 65 kg. What is the average power provided by the tension in the cable pulling the lift?
Add Answer to:
In 2.0 minutes, a ski lift raises 4 skiers at constant speed to a
height of...
In 2.0 minutes, a ski lift raises 4 skiers at constant speed to a height of...
In 2.0 minutes, a ski lift raises 4 skiers at constant speed to a height of 135 m. The average mass of each skier is 65 kg. What is the average power provided by the tension in the cable pulling the lift?
In 2.97 minutes, a ski lift raises four skiers at constant speed to a height of...
In 2.97 minutes, a ski lift raises four skiers at constant speed to a height of 131 m. The average mass of each skier is 69.6 kg. What is the average power provided by the tension in the cable pulling the lift?
3. At a ski resort a chair lift takes skiers up a 30° hillside to an...
3. At a ski resort a chair lift takes skiers up a 30° hillside to an elevation of 180 m as shown in figure 1. How much horsepower must the engine have to pull 50 skiers at a time, at a speed of 4.0 m/s, if the average mass of each skier and their equipment is 82 kg each and the frictional energy loss is 3.6MJ (Mega-Joules)? Hint: Power-Work/time
If ski lift raises 100 passengers averaging 660 N in weight, a machine raises passengers averaging...
If ski lift raises 100 passengers averaging 660 N in weight, a machine raises passengers averaging 667 N in weight to a height of 150 m in 60.0 s, at constant speed what aveage power is required of the force making the lift
1. Calculate the work done in kilojoules on a 1,146 kg elevator car by its cable...
1. Calculate the work done in kilojoules on a 1,146 kg elevator car by its cable to lift it 42 m at constant speed, assuming friction averages 135.9 N. 2. What is the cost of operating a 4.4 W electric clock for a year if the cost of electricity is $0.08 per kWh ? 3. Find the final speed for a skier in a downhill ski race who skies 80 m along a 24.7º slope neglecting friction if he or...
A crane is being used to lift a container onto a cargo ship. You need to...
A crane is being used to lift a container onto a cargo ship. You need to program the crane so that it lifts the container with a constant positive acceleration, a, during the first half of the lift and with a constant negative acceleration of the same magnitude, -a, during the second half of the lift. You want to do this so that the maximum speed of the container during the lift is 8.1 m/s. The containers are initially at...
A skier of mass 67 kg is pulled up a slope by a motor-driven cable. a)...
A skier of mass 67 kg is pulled up a slope by a motor-driven cable. a) How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 3.5 m/s? _________kJ (b) What power (expressed in hp) must a motor have to perform this task? _______hp
A crane is being used to lift a container onto a cargo ship. You need to...
A crane is being used to lift a container onto a cargo ship. You need to program the crane so that it lifts the container with a constant positive acceleration, a, during the first half of the lift and with a constant negative acceleration of the same magnitude, -a, during the second half of the lift. You want to do this so that the maximum speed of the container during the lift is 7.85 m/s. The containers are initially at...
A crane is being used to lift a container onto a cargo ship. You need to...
A crane is being used to lift a container onto a cargo ship. You need to program the crane so that it lifts the container with a constant positive acceleration, a, during the first half of the lift and with a constant negative acceleration of the same magnitude, -a, during the second half of the lift. You want to do this so that the maximum speed of the container during the lift is 7.90 m/s. The containers are initially at...
Chapter 6, Problem 6/160 The motor at B supplies a constant torque M which is applied...
Chapter 6, Problem 6/160 The motor at B supplies a constant torque M which is applied to a 395-mm-diameter internal drum around which is wound the cable shown. This cable then wraps around a pulley which has a mass of 86 kg and is attached to a cart which has a mass of 120 kg carrying 515 kg of rock. The motor is able to bring the loaded cart to a cruising speed of 2.7 m/s in 5 seconds. What...
3. At a ski resort a chair lift takes skiers up a 30° hillside to an elevation of 180 m as shown in figure 1. How much horsepower must the engine have to pull 50 skiers at a time, at a speed of 4.0 m/s, if the average mass of each skier and their equipment is 82 kg each and the frictional energy loss is 3.6MJ (Mega-Joules)? Hint: Power-Work/time
A crane is being used to lift a container onto a cargo ship. You need to program the crane so that it lifts the container with a constant positive acceleration, a, during the first half of the lift and with a constant negative acceleration of the same magnitude, -a, during the second half of the lift. You want to do this so that the maximum speed of the container during the lift is 7.85 m/s. The containers are initially at...
Chapter 6, Problem 6/160 The motor at B supplies a constant torque M which is applied to a 395-mm-diameter internal drum around which is wound the cable shown. This cable then wraps around a pulley which has a mass of 86 kg and is attached to a cart which has a mass of 120 kg carrying 515 kg of rock. The motor is able to bring the loaded cart to a cruising speed of 2.7 m/s in 5 seconds. What...
Most questions answered within 3 hours.
-
If authentic leadership is really a lifelong process,
can teenagers be authentic leaders? Why or why...
asked 23 seconds from now -
Six years of quarterly data of a seasonally adjusted series are
used to estimate a linear...
asked 18 minutes ago -
Which of the following is not an ecological model used
to foster behavior change?
PRECEDE-PROCEED Model...
asked 21 minutes ago -
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit
a golf ball with...
asked 17 minutes ago -
What are John’s potential claims if he is terminated
this week?
John is a 54-year-old man...
asked 31 minutes ago -
A (8.5) cm tall object is placed at a distance of (14.2) cm from
a convex...
asked 39 minutes ago -
(2) For the following questions, consider a data set that
exhibits a normal distribution. Report the...
asked 40 minutes ago -
What exactly is an information system? How does it work" What
are its people organization,
...
asked 41 minutes ago -
The Food Marketing Institute shows that 17% of households spend
more than $100 per week on...
asked 51 minutes ago -
Go to NCBI BLAST search web page
1st search: GEKDLRRAKDINQEVYNF
2nd search: PTSQRLQLLEPFDK
3rd search: GEKDLRRAKDINQEVYNF...
asked 55 minutes ago -
Explain how each of the following three conditions could be a
red flag for a register...
asked 59 minutes ago -
In a two-way factorial ANOVA, the final F-ratio for
factor AxB is determined by dividing _____...
asked 1 hour ago