What is the product of the algebraic sum of kinetic energy and potential energy?
Q: How is it possible to carry books to school without changing the kinetic or potential energy of the…
A: Given Data: Is it possible to carry books to school without changing the kinetic or potential energy…
Q: How much work must be done to stop a 1100-kg car traveling at 111km / h ? (Hint: You will need to…
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Q: Can you expend energy without doing any work? Given an example.
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Q: If the total mass of the sled and the girl is 25 kg in the coefficient of kinetic friction between…
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Q: How much work is done to expand a 10-cm diameter cylindrical chamber at 1 atm from a length of 10 cm…
A: Hence, the work done is 79.58 J
Q: While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body…
A: The expression for the power is as follows: P=WΔtP=W0mΔNΔt…
Q: A 4 kg ball falls from height of 29 . What willbe potential energy of the ball after 1 second? Use g…
A: Given data: mass m = 4 kg height h = 29 m time t = 1 sec
Q: A kid on a bike coasts (No Pedaling) from the bottom to the top of a 25 m hill. What is the energy…
A: Given: The kid goes from bottom to top. The height of the hill is 25 m.
Q: 5. (a) What is the kinetic energy in joules of a 1000kg automobile traveling at 90km/h? (b) How much…
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Q: How much work is done by a 59 kg ninja watrior in climbing a ladder that is 9 meters long? Express…
A: Mass of ninja warrior (m) = 59 kg Length of ladder (L) = 9 m
Q: You attempt to lift a 1200 N barbell for 10 min, excreting a 1200 N force, but won't move. How much…
A: Required : Amount of work done.
Q: How much energy does a 7kg box have if it is at a height of 5m? O 233 J O 123 J O 343 J O 453 J
A: Given Data: The mass of box is m = 7 kg. The height of box is h = 5 m. When a body is placed above…
Q: How much work is done on a downhill skier by an average breaking force of 813 newtons to stop her in…
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Q: In the previous Question (Q4), assume the coefficient of kinetic friction between the crate and the…
A: The objective of the question is to calculate the work done by the normal force and the friction…
Q: You lift your 8.4 kg back pack off your bedroom floor and place it on your desk. It your desk is 2.7…
A: Given mass m = 8.4 kg displacement = height h = 2.7 m
Q: A vehicle weighing 1000 kg goes downhill from 2000 feet to 1000 feet at a velocity of 60 mph. Which…
A: Given information: The mass of the vehicle (m) = 1000 kg The initial height of the vehicle (h1) =…
Q: For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at…
A: Given data: Weight (mg) = 400 N Height (h) = 2.20 Time (t) = 1.60 s Required: The metabolic energy…
Q: (a) What is the kinetic energy in joules of a 900-kg automobile traveling at 92 km/h? ____ J (b)…
A: The kinetic energy (KE) of an object is the energy that it possesses due to its motion. Kinetic…
Q: A car accelerates from zero to a velocity v. Another car of indentical mass accelerates from zero to…
A: Given value--- A car accelerates from zero to a velocity v. Another car of indentical mass…
Q: How much work is done by a person lifting a 4.1 kg object from the bottom of a well at a contact…
A: Given Data: The mass of an object is, m=4.1 kg The contact speed is, v=2.2 m/s The time required for…
Q: (a) What is the kinetic energy in joules of a 1150-kg automobile traveling at 79 km/h? =____ Joules…
A: a. the kinetic energy in joules is KE=12mv2=121150kg79km/h×0.2777m/s1km/h2=2.76×105 J
Q: How can we ignore the self-potential energy when doing a work-energy problem or an…
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- Judy has started fast walking for half an hour each day in an effort to lose weight. Judy currently weighs 100 kg. She walks expending about 0.1 kcal per kg of body weight per minute. For a woman, we multiply the body weight in kg by 0.9 kcal/kg body weight/hour to calculate her BMR. What is Judy’s daily energy expenditure? (Ignore TEF due to its small portion)?When a driver applies the brakes to keep a car going downhill at constant speed and constant kinetic energy, the potential energy of the car decreases. Where does this energy goes? In contrast, discuss where most of it goes with a hybrid vehicle.A motorcyclist runs out of gas on a level road 250 m from the gas station. She pushes the 220-kg motorcycle with a constant force of 150 N. How much work does she do? For the motorcycle of the previous problem, if it was moving with a kinetic energy equal to the work done on it, how fast would it move?
- A stone is propelled vertically off the ground. After it is released, which of the following are true? It’s total mechanical energy increases It’s total energy is proportional to its distance off the ground It’s kinetic energy decreases It’s gravitational energy increasesCatching a wave, a 77-kg surfer starts with a speed of 1.1 m/s, drops through a height of 1.50m, and ends with a speed of 8.5 m/s.How much nonconservative work was done on the surfer?3) The figure below illustrates a skier who is skiing on a large frictionless spherical ball of snow. The skier can be treated as a point-like object. The skier starts at the top of the ball with very little speed and picks up speed while traveling along the surface of the snow. During this time, the only forces acting on the skier are the gravitational force applied by the Earth and the normal force applied by the snow. At the moment the radial line extending from the skier to the center of the ball defines an angle a with respect to a vertical line, the skier is about to lose contact with the ball. Determine the value of a.
- We know from the reading that it is possible to move the same object two different distances and still do the same amount of work. Let's consider an example in which Jane pushes a block of ice up an incline while Kip lift the same block of ice vertically to the top of the same incline. See the figure below. (look at picture) We will assume that there is no friction between the surface of the incline and the block of ice. Both of these situations will require the same amount of work and that the result of lifting the ice block to some height imparts potential energy to the ice. In this activity, we will make various calculation to help us better understand the relationship between work and potential energy and the idea of conservation of energy. For this activity we will assume that the mass of the ice block is 5.6 kg and the vertical height of the incline is 2 m. This is the vertical distance that Kip must lift the block of ice. We will assume that the acceleration due to gravity is 10…How much work is done by gravity when dead lifting a 100.0 kg barbell 64.11 cm from the floor to hip level [round your final answer to zero decimal places]?