subject
Physics, 05.07.2019 02:10 noathequeen

A. deanna, who has a mass of 63 kg and who is about 5'10" tall, runs from the intersection at bluemont and manhattan avenue (where the bluemont hotel is), to the top of the hill on manhattan avenue (an elevation change of 120 feet) 1. what is the component of deanna's displacement that is parallel to gravity as she runs from the bottom to the top of the hill? state your answer in meters. 2. what is the magnitude of the force of gravity acting on deanna? 3. explain why the total work that gravity does on deanna is negative in this situation 4. what is the total work that gravity does on deanna in this situation? 5. how much work does deanna do against gravity as she runs up the hill? state your answer both in joules and in kilocalories 6. explain why the total work that gravity does on deanna is not affected by the shape of the hill 7. calculate the total increase in deanna's gravitational potential energy from running up the hill. show your reasoning. 8. deanna burns about 50 kilocalories as she runs up the hill. compare this value to the amount of work that deanna does against gravity. does the relations hip between these values make sense? explain

ansver
Answers: 1

Another question on Physics

question
Physics, 21.06.2019 17:00
After a car's engine has been running for a while, if you stand near the car's engine you can often feel heat coming from the engine as a result of a. radiation b. convection c. conduction
Answers: 1
question
Physics, 22.06.2019 06:30
Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)
Answers: 1
question
Physics, 22.06.2019 11:50
Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
Answers: 2
question
Physics, 22.06.2019 17:10
As the distance from a magnet increases, what happens to the magnet force?
Answers: 1
You know the right answer?
A. deanna, who has a mass of 63 kg and who is about 5'10" tall, runs from the intersection at bluemo...
Questions
question
Mathematics, 18.10.2019 17:30