Explain, in terms of the definition of power, why energy consumption is sometimes listed in kilowatt-hours rather than joules. What is the relationship between these two energy units?
Q: 2. A 2.70 kg block starts from rest and slides a distance d down a frictionless 32.1° inclined…
A: Mass of the block m=2.7 kg and angle of incline is 32.1o. The block starts from rest (u=0) and comes…
Q: Provide given, unknown, FBD and complete solution. This is Conservation of Energy topic. A 200-lb…
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Q: 1 kWh- 1000 j/sec 1 kWh - 3400 BTUS 1. 3000 watts =3 kW %3D 2. 50,000KW = 3. 4.5 x 10^ 6 watts = 4.…
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Q: To make a batch of cookies, you mix half a bag of chocolate chips into a bowl of cookie dough,…
A: Here's the information that we need to use: FF is the applied force vv is the speed ΔtΔt is the…
Q: Which do you think requires more power: moving up stairs at a slow speed (ex: walking) or moving up…
A: Let’s get this out of the way first: energy is a scalar quantity an its units are joules.…
Q: Two people of the same mass climb the same set of stairs . Person A climbs the stairs in 25s. Person…
A: Since both the persons have to climb the same set of stairs, the work done by both the persons is…
Q: How to solve this problem using the energy method? Like with potential energy and kinetic energy?
A: The expression of the speed from conservation of energy,
Q: Water flows over a dam at a rate of 66,000 kilograms/second at a hydroelectric plant. a) How much…
A: We are given mass of water flowing over dam per second. We are also given the height through which…
Q: Explain the relationship between kinetic energy and gravitational potential energy during a vertical…
A: Refer explanationExplanation:During a vertical jump, kinetic energy and gravitational potential…
Q: A 70 lb child runs uphill, gaining 50 feet in elevation in 14 seconds. Calculate the average power…
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Q: A learner weighing 800N runs up 20 stairs each 20cm high in 4s. How much power is exerted by the…
A: Lerner weighing= 800 N Total displacement= 20×20= 400 cm= 4 m Time= 4s
Q: A person in good physical condition can put out 100 W of useful power for several hours at a…
A: We know that one people produces an output of 100 W so the number of people that can produce 5 kW of…
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: How much work in the vertical direction is required for a 68 kg cyclist to ride a 10 kg bike 1500…
A: distance travelled along the slope= D=1500 m height attained in this climb= H tan100=HD H=264.5 m
Q: Explain, in terms of the definition of power, why energy consumption is sometimes listed in…
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Q: A cowboy shoots a pistol in the air when he rides a horse into a small town. The muzzle speed is…
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Q: The work done in pushing a TV set a distance of 2 m with an average force of 55 N is _________ . In…
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Q: In physical terms, explain why friction is a nonconservative force. Does it store energy for future…
A: The friction is a non conservative and its use in future use is given as,
Q: 2 people of the same mass climb the same set of stairs. Person A climbs the stairs in 25s. Person B…
A: Part (a) The work done does not depends on the time taken by both the people. The expression for…
Q: Show the fbd/figure, given and formula used. A man whose mass is 70 kg walks up to the third floor…
A: Given that,The mass of man (m) = 70 kgThe vertical height (h) = 12 ma : Here we need to find the…
Q: 1. A crate of mass 10.0 kg is pulled up a rough 20 degrees incline. The pulling force is 100 N…
A: This is the FBD for the given system. Here, m = 10 kg θ = 200 F= 100 N µ = 0.4 d = 5 m
Q: A 105-kg basketball player crouches down 0.400 m while waiting to jump. After exerting a force on…
A: (a) Apply principle of conservation of energy to find the velocity the player leaves the floor…
Q: A shooting star is the trail of a meteor - a chunk of debris hurtling through Earth’s atmosphere. As…
A: Energy = (1/2)m(v)2 E = (1/2)(0.002)(100000 * 1609.4/3600)2 E = 1998586.7 Joules Work done =…
Q: The gravitational potential calculation was larger than the direct measurement based on velocity.…
A: The total energy of the system is always conserved so the central concept behind the concept is not…
Q: A 80 kg man runs up a a flight of stairs with a height of 10 meters in 10 seconds. calculate…
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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: 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: The figure below shows a person pushing a box with a force of 2.2 N over a displacement of 2.5 m.…
A: The person exerts a force of 2.2 N on the box over a displacement of 2.5 mFrom Newtons third law of…
Q: How much work was done by friction as the block slid from point A to point B? Express your answer in…
A: Mass of block = 0.33 kg Vertical distance moved by block = 2.41 m Speed at B ,Vb = 5.8 m/s
Q: The figure below shows a person lifting a box with a mass of 29.8 kg to a height of 1.8 m. Determine…
A: The potential energy U of an object of mass m at a height h above the reference level, is given by,…
Q: A horizontal spring is stretched 10 cm and then released from rest. Will the spring ever stretch a…
A: Given that: The spring was stretched 10 cm initially and released from rest.
Q: How much power would you have produced if you lifted 100 kilograms upwards 2 meters in .3 seconds?
A: Given,
Q: About 50,000 years ago, a meteor crashed into the earth near present-day Flagstaff, Arizona.…
A: Consider the mass of meteor is about 1.4×108 kg which hits at a speed of 12×103 m/s.
Q: A man starts at ground level and carries a 20 kg box up a flight of stairs to a height of 3.6 m. He…
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Q: A learner weighing 800N runs up 20 stairs each 20cm high in 4 seconds.how much power is exerted by…
A:
Q: drive a Nissan Leaf to work. With the e-pedal on, the motor recovers energy through braking very…
A: Given, With the e-pedal on, the motor recovers energy through braking very aggressively. It takes…
Q: Common misconceptions about energy: (With Explanation) 11. The terms "energy" and "force" are…
A: We have to explain the misconception with example that the words energy and force are not…
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