Remember PE- mgh Solve the probtems below 1. A cart at the top of a 200 m hil has a mass of 60 kg. What is the cart's gravitational potentiel energy? KE mv ANSWER
Q: A 45.0 kg skater is skating down a hill on roller blades at à špêed of m/s. What is the kinetic…
A: Given data : Speed=V Mass=m To find : Kinetic energy of skater
Q: A boy exerts 10N force to push a box 5m along a level surface in 10s. How much power is used by the…
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Q: A 10,000 kg object is traveling at 20m/s. If it stops in 5s, what is the power output of the breaks?
A: Given data The mass of the object is given as m = 10,000 kg. The velocity of the object is given as…
Q: What is the amount work that is done by lifting 90 kg stone block from a small piller that is 1.0 m…
A: The mass of the stone (m) = 90 kg The height of the stone is lifted (h) = 1m And the distance of the…
Q: The moon has a mass of 7.348 X 1022 kg and is 384.4 X 105 km from the Earth, which has a mass of…
A: Let mm be the mass of moon, me be the mass of earth, r be the distance between earth and moon, and G…
Q: a force of 5 punds compresses a 15 inch spring a toatl of 3 inches how much work is done in…
A: Given data The magnitude of the force is Fs = 5 pounds The compression in the spring is x = 3 inch…
Q: It takes a force of 35.17 Newtons to stretch a 34-cm spring to 81-cm and hold it there. How much was…
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Q: A roller coaster is moving at 10 m/s at the top of the first hill (h= 63 m). Ignoring friction and…
A: Concept Apply work energy theorem, Change is Potential Energy=Gain in Kinetic energy
Q: What is its potential energy at this position?
A: Given Mass = m = 10 kg Height = h = 2m Calculate = potential energy = P
Q: A personal watercraft and rider have a combined mass of 378 kg. What is their kinetic energy (in J)…
A: Given data, Total combined mass of watercraft and rider , m = 378 kg velocity of watercraft and…
Q: WorkA gainsGt ravity Compute the work W against the earth's gravitational field required to move a…
A: R=Radius of Earth=6371000 mM=Mass of Earth=5.972×1024 kgm=Mass of satellite=600 kgh1=Initial…
Q: A meteor with the mass 1.4×10^8 kg hits Earth at 12km/s. What is the kinetic energy delivered to the…
A: The given values are,
Q: What is the current total mechanical energy of 80-kg skydiver whose speed is 70 m/s at an altitude…
A: solution as
Q: The potential energy of a girder, after being lifted to the top of a building, is 5.17 × 10⁵ ft lb.…
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Q: LA car with a mass of 2,000 kg drives to the top of a 100-meter hill in 15.0 seconds. Find the…
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Q: ctice Problems 1. TA spring has a natural length of 14 ft. If a force of 500 lbs is required to keep…
A: Dear student The work done by spring force is expressed as: W = 12K(xf2-xi2) Here, xi = Initial…
Q: a shot putter hrows a 6kg shot with a final velocity of 7m/s. What is the kinectic energy of the…
A: Given that, A shot putter throws a 6 kg shot with a final velocity of 7 m/s Mass = 6 kg Velocity =…
Q: A person goes up a flight of stairs in 20 s. If the person weighs 600 N, and the vertical height of…
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Q: Newton's law of universal gravitation is represented by F= G* Mm/ T where F is the gravitational…
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Q: Velocity is 30 m/s and mass is 60 kg. What is kinetic energy.
A: Dear student The kinetic energy is defined as : K = 1/2 mv2
Q: Calculate the gravitational potential energy of a 9.50 kg mass (a) on the surface of theEarth and…
A: Step 1Gravitational potential energy is the energy possed by an object because of the gravitational…
Q: If a box having a weight of 100 N is kept at a height of 20 m , calculate its Gravitational…
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Q: An object with mass 99 kg is moving at the velocity of −3.6 m/s. What is its kinetic energy in the…
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Q: A car of mass 2400 The drives with a velocity such that it has a kinetic energy of 400 Btu. Find the…
A: The mass of the car m=2400lbm Let take 778.17(ft lbf)/Btu 32.174(lbm ft)/(lbfs^2)
Q: Using energy methods, calculate the speed of the sphere when it is 0.100 m above the sheet. Fynress…
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Q: The Elf on the Shelf has mass 0.500 kg and is sitting on a shelf some height y above the ground. If…
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Q: Compute potential energy Mass of box-5.5 kg Raised to height=2 m Take g=10 m/s2
A: We have a mass of box m=5.5 kg which is raised to a height h=2 m. The box will experience a…
Q: A 2 kg ball is held 1.5 m above the ground. How mugh gravitational energy does it have? In…
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Q: Abox is moved using 200 N of force over a distance of 15 m. If the box is moved in 1.4 seconds, how…
A: Power is equal to the rate of work done with respect to time.So if W amount of work is done within…
Q: What is the gravitational potential energy of a 20 kg sledgehammer when it is lifted 3 m in the air?…
A: Given data: Mass (m) = 20 kg Height (h) = 3 m Required: The gravitational potential energy
Q: A 1,200 watt motor bike can move at a maximum speed of 30 m/s. How much force does the motor exert?
A: Given data: Power (P) = 1,200 W Maximum speed (v) = 30 m/s Required: Force (F)
Q: Calculate the potential energy of a ball having mass of 10 lbs on top os Stinson building at a…
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Q: How much energy in terms of U is stored when spring is compress twice as much?
A: Given information: The compression in the spring = x0 The potential energy stored in the spring = U0
Q: An ideal spring of negligible mass is 12,00 cm long when nothing is attached to ît, When you hang a…
A: Given: The natural length of the spring is 12 cm. The final length of the spring is 13.4 cm due to…
Q: What is the kinetic energy(in hpjof a 1,860 lb body traveling at 77 ft/sec.
A: Given data: Mass of the body, m=1860 lb velocity of body, v=77 ft/sec Our question is to find the…
Q: What is the horsepower of a 1,500.0 kg car that can go to the top of a 371.0 m high hill in exactly…
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Q: A 3 kg mass falls a distance of 7.87 m to the ground. What was the object’s change in gravitational…
A: Potential energy = mgh m= 3kg h= 7.87 m
Q: Show that the gravitational potential energy of an object of mass at height on Earth is given by PEg…
A: Given: The mass of the object is m. The height of the object is h. The acceleration due to gravity…
Q: A 15N force is applied to a spring with a spring constant 300N/m. How much work was required to…
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Q: es a force of 34.92 Newtons to stretch a 27-cm spring to 83-cm and hold it there. How much was the…
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Q: what is the answer for this qustion? pleas show work for all steps.
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Q: A body travels at a velocity of 8 cm/min. What is its kinetic energy in J/kg?
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Q: woel 10 m 3 m A B
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Q: An asteroid was discovered. It is estimated to have a mass of 2.14 x 1021 kg and is moving at a…
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Q: A roller coaster has 800,000 Joules of kinetic energy and is moving aith a sneed of 40 m/s. What is…
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Q: ) How much work is done when a 50N a Floor pushed along distance 10 m?
A: Given data :- Force F = 50 N displacement d = 10 m
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- Check Your Understanding If we send a probe out of the solar system starting form Earth’s surface, do we only have to escape the Sun?Show that the areal velocity for a circular orbit of radius r about a mass M is At=12GMr . Does your expression give the correct value for Earth’s areal vilocity about the Sun?Check Your Understanding The U.S. Air Force uses “10gs” (an acceleration equal to 109.8m/s2 ) as the maximum acceleration a human can withstand (but only tot several seconds) aid survive. How much time must the Enterprise spend accelerating if the humans on board are to experience an average at most 10gs of acceleration? (Assume the inertial dampeners are offline.)
- Check Your Understanding Why not use the simpler expression U=mg(y2y1) ? How significant would the error be? (Recall the previous result, in Example 13.4, that the value g at 400 km above the Earth is 8.67m/s2 .)Check Your Understanding Galaxies are not single objects. How does the gravitiational force of one galaxy exerted on the “closer” stars of the other galaxy compare to those farther away? What effect would this have on the shape of the galaxies themselves?Qnos: You wish to put a loo0 - kg satellite Pnto Os bit the earth's suface. circular 30okm above speed have? (b) How ca) What pesiod and Badial accelxation will it much wok must be done to the Satellite to þut put it in dkbit? (C) Hew much additional wobk to be donme to make the sadellite to make the satellite escape ignoved the saellite's the Yotahion of the In part (6) if kinetic ene How much difference does this pellonal spaceckaft is the earth? we initial due to earth make? low Suppese your altitude Sacular or bit Qưound the easth. Aix of the on the spacecft to deckease slighty: Does the speed of spacecft i) reammain the same resistance from the outer atmosphere does negadine work Causing the obbital dius o8 Cii) decease? what point in planet an elliptical obit does a the fastest? The sbwest? move
- Qnos: You wish to put -kg satellite Pnto circular os bit 30okm the earth's subface. above speed have? (b) How to the pesiod and Xadial accelkation much wook must be (a) What will it done Satellite が put put it in obit? (C) Haw additional wk, to be dome to much make the sadellite to make the satellite escape In paxt (6) if we Kinetic enery much difference does this ignored the salellite's the Yotahion of the the అ initial due to earth How make? low spacechaft Suppese you'r pellonal altitude Sacular is đeound the easth. Ar of the on the spocectaft to deckease slighty: Does the speed of spacecraft i) Yeaain the same or bit from negodive work resistance the outer veglon atmos phere does Causing the obbital radius o8 (ii) decoease? what point n blanet move an elliptical o8bit does a the fastest? The Slowest?In introductory physics laboratories, a typical Cavendish balance for measuring the gravitational constant G uses lead spheres with masses of 1.20 kg and 12.0 g whose centers are separated by about 4.90 cm. Calculate the gravitational force between these spheres, treating each as a particle located at the center of the sphere. Need Help? Master It Read ItThe gravitational field a distance r inside a spherical cloud of radius R and total mass M is given by GNM 2f, R' where GN is Newton's gravitational constant. The gravitational potential, P,, at a point r < R inside the cloud, relative to infinity is given by the expression GyM ( – R*) aR What is a ? 4
- An asteroid closely passes the Earth at a range of 17200mi and a relative speed of 7.8km/s.The diameter is estimated at 30mwith a specific gravity of 3. If this asteroid had impacted Earth, how much energy would have been released? Express this quantity in units of mega-tons (M ton) where a megaton is the energy released by one million metric tons of TNT explosive. A metric ton is 1000kgand the explosive energy density of TNT is 4184J/g.Hint: If the asteroid hits the Earth, its relative velocity becomes zero. Ignore any change in asteroid velocity due to gravitational acceleration or air resistance.A spherical shell has the surface density p and its radius is R, The gravitational force between this shell and a small sphere of mass 0.25Kg locoted at the distance of rfrom the centre of shell is given by GTRP O GRR?/3 O GIRP O None from these answers.A satellite has a mass of 381kg and is located at 2.05x106m above the surface of Earth a) What is the potential engery associated with the satellite at this loctaion b) What is the magnitude of gravitational force on the satellite