You climb 10 stories of a skyscraper, constituting a change in height of 40 meters, in...
You climb 10 stories of a skyscraper, constituting a change in height of 40 meters, in a time of 5 minutes. If your mass is 58kg what was your average power output in watts?
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You climb 10 stories of a skyscraper, constituting a change in
height of 40 meters, in...
The average height of a skyscraper in London is µ = 190 meters and the standard...
The average height of a skyscraper in London is µ = 190 meters and the standard deviation is σ = 36 meters. Building height is normally distributed. 3a. Draw a normal curve below and fill in the mean value and the values for +/- 1, 2, and 3 standard deviations above and below the mean. Show your work. 3b. What is the probability (list as a percentage) that a randomly selected skyscraper in London is taller than 190 meters? Show...
A new record for running the stairs of the Empire State Building was set on February...
A new record for running the stairs of the Empire State Building was set on February 3, 2003. The 86 flights, with a total of 1576 steps, was run in 9 minutes and 33 seconds. Part A If the height gain of each step was 0.20 m, and the mass of the runner was 71 kg , what was his average power output during the climb? Give your answer in both watts and horsepower. Part B Express your answer using...
A service elevator lifts 300 kg of cargo up to 10 stories (40m). The electric motor...
A service elevator lifts 300 kg of cargo up to 10 stories (40m). The electric motor that supplies the mechanical energy for the lift uses 3000 kilojoules of electrical energy when performing this task within 20 seconds. How much potential energy does the elevator's cargo have at the end of this short ride (J)? How much work (change in mechanical energy) does this elevator system output by doing this task (J)? What is the energy % efficiency of the system?...
A. You wish to create an image that is 10 meters from an object.This image is to be inverted and half the height of the...
A. You wish to create an image that is 10 meters from an object. This image is to be inverted and half the height of the object. You wish to accomplish this using one spherical mirror.What is the focal length f of the mirror that would accomplish this?Express your answer in meters, as a fraction or to three significant figures.B. You wish to create an image that is 10 meters from an object. This image is to be upright and half...
2. Running up the stairs (5 pts). Time how long it takes for you (or a...
2. Running up the stairs (5 pts). Time how long it takes for you (or a friend) to run as fast as possible up a staircase. Measure the height of one step and count the steps to find how high you climbed. a) How much mechanical energy did you produce to climb the stairs? b) What was the average mechanical power produced during your climb? c) Estimate the muscle mass in your upper legs (quadriceps, hamstrings, and buttocks). (Recall that...
Assignment 9 If you run around a half-mile track twice in 20 minutes a. What is...
Assignment 9 If you run around a half-mile track twice in 20 minutes a. What is the total distance traveled? b. What is the speed in mi/hr (show work)? c. What is the total displacement? d. What is the velocity in mi/hr? You travel east 2 miles and then turn to the north and walk another 3 miles. What is your displacement (show work, make sure to show the direction as well)? You travel 6 miles at 40 degrees. How...
Name 1) Date More Energy and Power Problems The system starts at rest. What is the...
Name 1) Date More Energy and Power Problems The system starts at rest. What is the speed of the system in the instant before the 10 kg mass hits the floor? LLLLLLLL m = 10kg h=2m m2 = 5kg 2) A 1400 kg sports car accelerates from rest to 95 km/h in 7.4 s. What is the average power delivered by the engine? 3) How fast must a cyclist climb a 6 hill to maintain a power output of 186...
39. (4 pts) A 500-g mass drops from a height of 10.0 meters. What is its...
39. (4 pts) A 500-g mass drops from a height of 10.0 meters. What is its speed just before it hits the ground? 40. (4 pts) A flight attendant pulls a wheeled suitcase, applying a 66-N force at a 35° angle to the horizontal. How much work does she do in pulling the suitcase 45 m? 41. (4 pts) A 1525-kg car drives up a mountain road a vertical rise of 1301 m from the base elevation in 30. min...
You ride your bike up a winding mountain road that has a vertical height of 1308...
You ride your bike up a winding mountain road that has a vertical height of 1308 m in 51.9 minutes. If the mass of you and your bike is 67.8 kg, (a) what was your metabolic power (W)? (b) How many Calories did you spend to get up the hill?
5. A person's height is 5 foot 9 inches. What is their height in meters? Show...
5. A person's height is 5 foot 9 inches. What is their height in meters? Show your calculation. 6. You know the following nutritional information about a food: Carbohydrate - 8 grams, Fat - 8 grams, Saturated Fat - 4 grams, Sodium - 490 mg, Protein - 12 grams. Based on this information, estimate the number of kilocalories in this food. Show your work. 7. Which nutrients are classified as macro-nutrients? 8. Can a food be bad for you? (I...
Name 1) Date More Energy and Power Problems The system starts at rest. What is the speed of the system in the instant before the 10 kg mass hits the floor? LLLLLLLL m = 10kg h=2m m2 = 5kg 2) A 1400 kg sports car accelerates from rest to 95 km/h in 7.4 s. What is the average power delivered by the engine? 3) How fast must a cyclist climb a 6 hill to maintain a power output of 186...
39. (4 pts) A 500-g mass drops from a height of 10.0 meters. What is its speed just before it hits the ground? 40. (4 pts) A flight attendant pulls a wheeled suitcase, applying a 66-N force at a 35° angle to the horizontal. How much work does she do in pulling the suitcase 45 m? 41. (4 pts) A 1525-kg car drives up a mountain road a vertical rise of 1301 m from the base elevation in 30. min...
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