A weightlifter curls a 30 kg bar, raising it each time a distance of 0.60 m. How many times must he repeat this exercise to burn off the energy in one slice of pizza?

Q: Energy that is not utilized for work or heat transfer in the human body is converted to the chemical…

A: The total energy burns is, Eburn=1.2 kcal/min8 hours60 min1 hour+1.7 kcal/min16 hours60 min1…

Q: For how long would a 68 kg athlete have to swim at a fast crawl to use all the energy available in a…

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Q: In the winter activity of tubing, riders slide down snow covered slopes while sitting on large…

A: mass of tube (m) = 2.50 kg constant tension (T) = 12 N height (h) = 12 m Length of slope (L) = 60 m…

Q: On a playground slide, a child has potential energy that decreases by 1000J while her kinetic energy…

A: Friction is involved between the slide and the clothes of the child.  The work done by friction can…

Q: In a bicycle race, a rider such as Lance Armstrong (mass = 70 kg) uses energy at a rate of 6.0 W/kg…

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Q: A 1000 N crate slides 11 mm down a ramp that makes an angle of 31 ∘∘ with the horizontal. If the…

A: The given values are, w=1000 Nd=11 mθ=31°

Q: A weightlifter lifts a 50 kg bar from the floor to a position over his head and back to the floor…

A: To find energy transformations that has taken place, by the weightlifter. Given, Mass of bar, m = 50…

Q: 9. The 1.25 kg box, starting from rest, slides down the ramp and into the spring (k=10 N/m)…

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Q: A small 142 gram (0.142 kg) pinewood derby car sits at the top of a 1.20 meter high sloped…

A: SOlution: Given that m = 0.142 kg h = 1.2 m energy loss = 5% of its energy

Q: A 68-kg woman is planning to bicycle for an hour. If she is to meet her entire energy needs while…

A: A 68-kg woman is planning to bicycle for an hour. If she is to meet her entire energy needs while…

Q: Question #: 23 If a person who normally requires an average of 12,000 kJ (~ 3000 Cal) of food energy…

A: If a person who normally requires an average of 12,000 kJ (3000 kcal) of food energy per day…

Q: From what height must a block of ice be dropped so that it melts completely on falling? Assume…

A: The amount of heat per unit mass transferred during change of state of substance is called latent…

Q: For how much time can a 70 kg person ride a bike at 15 km/hr on a flat path, using only the energy…

A: Given: The metabolic power P = 480 W Mass of a rider m = 70 kg. Velocity of rider v = 15 km/hr =…

Q: 25. An engine is 99% efficient. How much work could an engine that runs at 888 J produce? O 800 J O…

A: Efficiency of the engine,  Heat supplied to the engine,

Q: A 100-g Frisbee is thrown at a speed of 5.5 m/s, 1.3 m above the ground. The Frisbee has a potential…

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Q: How much work is needed to push a 20-kg block of steel across a horizontal steel table at a steady…

A:

Q: A 3.0 × 10-3 kg copper penny drops a distance of 50.0 m to the ground. If 65 percent of the initial…

A: Given data: Mass, m = 3.0 × 10-3 kg Height, h = 50m   Solution: The equation of the potential energy…

Q: A(n) 80.0-kg student eats a 160-Calorie doughnut. To burn-it-off, he decides to climb the steps of a…

A: Work done is equal to product of force and displacement and work done is stored in the form of…

Q: A fun-loving, 11.0 kgkg otter slides up a hill and then back down to the same place. If she…

A: Given data:  The otter slides up and come back to the same place. Mass (m) = 11.0 kg Initial…

Q: A 68 kg woman cycles at a constant 15 km/h All of the metabolic energy that does not go to forward…

A: Given  weight of the woman = 68 kgs Velocity of the woman = 15 km/h To find out  How many kilograms…

Q: A 65-kg indoor rock climber eats an energy bar that has 500 kilocalories to fuel an afternoon of…

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Q: While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body…

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Q: On average, how much energy do humans radiate each second?

A: If we assume that total energy emitted by human is in form of heat then total heat emitted per…

Q: a 16 kg girl slides down a playground slide that is 4.8 m high. when she reaches the bottom of the…

A:

Q: In the winter activity of tubing, riders slide down snow covered slopes while sitting on large…

A: The amount of thermal energy is 469.1 J

Q: A typical human diet is " 2000 calories " per day , where the " calorie ” describing food energy is…

A: Given: The answer is shown as:

Q: A weightlifter curls a 35 kg bar, raising it each time a distance of 0.60 m. How many times must he…

A: A slice of pizza contains 1260 J. A fraction of this energy can be used as work and the remaining is…

Q: Assuming running consumes 108 calories per mile. If you run 9 minute miles, what is your average…

A:

Q: We drop a plastic ball to the floor from a height of 2.0 m and let it bounce several times. 30% of…

A:

Q: A car with mass of 1138 kg accelerates from 0 m/s to 40.0 m/s in 10.0 s. Ingnore air resistance. The…

A: Solution:   Given Values, Mass (m)=1138 Kginitial velocity(u)=0 m/sfinal velocity(v)=40…

Q: started fast walking for half an hour each day in an effort to lose weight. Judy curren

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Q: You plant o eat 9.1kcal of hot fudge sundae and then run up several flights of stairs to work off…

A: Given that, Amount planted, E = 9.1 kcal Mass, m = 38 kg We need to find the height climbed by the…

Q: If a typical city consumes electrical energy at a rate of 2.0 GW (that's 2 billion joules per…

A: Given data The power is given as P = 2 GW. The time duration is given as t = 14 weeks. The speed of…

Q: A 45 kg softball player slides into second base, generating 350 J of thermal energy in her legs and…

A:

Q: A 900 N crate slides 12 m down a ramp that makes an angle of 35° with the horizontal. If the crate…

A: mg=Weight of crate=900 Nθ=Angle of slope=35°Length of ramp=12 m

Q: A 50.0 - kg student evaluates a weight loss program bycalculating the number of times she would need…

A: Given:Mass of the student = 50 kgEnergy release by 1 kg fat = 3.77 X 107 J of chemical energyEnergy…

Q: While running, a person dissipates about 0.600 J of chemical energy to mechanical energy per step…

A:

Q: A bicyclist on a flat road expends energy at a rate of 80 W. How many Joules of energy are expended…

A:

Q: The energy dissipated when a car hits a tree at 70 miles per hour is ABOUT how much greater than…

A: Let the mass of the car is 1 Kg. Where, m = mass of the car v = velocity of car

Q: A 2 kg object moves with a velocity of 4 m/s for a time of 10 seconds. How much KE does the object…

A: Given data:  Mass (m) = 2 kg Velocity (v) = 4 m/s Required: Kinetic Energy

Q: A stone is dropped in air from a height of 50 meters above the ground. As the stone falls, what…

A: Kinetic energy is the energy associated with the movement of objects. Although there are many forms…

Q: A 20.0-kg child descends a slide 1.90 m high and reaches the bottom with a speed of 1.35 m/s . a)…

A: As we know, Kinetic energy (KE) = 1/2 mv2  --------(1) where m is the mass of a child and v is…

Q: The United States Patent and Trademark Office rejects claims for perpetual motion machines (in which…

A: According to the first law of thermodynamics, part of heat supplied to a system is used for…

Q: A 17.0 kg object was let go down an incline that is 3.50 m high. The object reaches the bottom of…

A: In the question , given the value of mass of object , height and speed of object and we have to find…