0.475-kg ball is thrown straight downward with a speed of 2.21 m/s from a platform 11.2 m above the ground. Air resistance does -6.81 J of work on the ball during its decent. What is the speed of the ball (in m/s) just before it hits the ground

Q: A roller coaster (329 kg) moves from A (8.67 m above the ground) to B (26.9 m above the ground). Two…

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Q: A bag of wheat weight 2300 kg .To what height should it be raised so that potential energy is 7890J?…

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Q: 62.0 kg skier starts from rest at the top of a ski slope 55.0 m high. (a) If the frictional forces…

A: mass of skier (m) = 62 kg height (h) = 55 m work done by frictional forces = -9800 J

Q: A mechanic pushes a 2280 kg car from rest to a speed of v, doing 5252 J of work in the process.…

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Q: A 20 kg chair has 250 J of potential energy relative to the ground. If the chair is dropped from its…

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Q: A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity,…

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Q: The force F=(5.42N)i^+(4.63N)j^ acts on a particle as it moves along the following path. First it…

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Q: A 0.479-kg ball is thrown straight downward with a speed of 1.40 m/s from a platform 6.65 m above…

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Q: A 69.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 8.9 m/s.…

A: The objective of the question is to find the maximum height the athlete attains, her speed at half…

Q: A stone with a mass of 120 g is fired from a catapult into the air at an angle of 45° to the…

A: air resistance is ignored

Q: A rollercoaster cart of mass 400kg is moving at the top of the first hill (25m high) at a speed of…

A: Given data:  Mass (m) = 400 kg Initial height (hi) = 25 m Initial velocity (vi) = 3.3 m/s Final…

Q: A 520-kg dragster accelerates from rest to a final speed of 105 m/s in 390 m, during which it…

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Q: A 69.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 8.9 m/s.…

A: The objective of the question is to find the kinetic energy of the athlete at the maximum height she…

Q: A 3.11-kg model rocket is launched straight up. It reaches a maximum height of 91.5 m above where…

A: Given,  Mass(M) = 3.11 kgWork done by Air resistance(W) =-690 J

Q: A sport car of mass 1.2 t is accelerating at 6.0 m/s^2. How much work is done by the resultant force…

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Q: A train travelling at 18.55 m/s is receding from a stationary observer, and sounding a warning horn…

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Q: A batter hit a 0.145kg baseball straight upward with an initial speed of 25.0m/s. Use the…

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Q: A 28-kg skier starts from rest at the top of a rough (not frictionless) 39° slope and travels 199 m…

A: To solve the question we will find out the potential energy at the top of the slope and the kinetic…

Q: A 4.0 kg block starts with a speed of 12 m/s at the bottom of a plane inclined at 35° to the…

A: mass of block, m= 4 kg initial speed, u = 12 m/s Coefficient of friction, μk= 0.32 θ= 35°

Q: s thrown vertically u peed of 12.0 m/s. W

A: Given as, u= 0.48 kg, m= 12.0 m/s.

Q: object of mass 3.0 kg is dropped from a certain height. Just before it strikes the ground it has a…

A: According to conservation of energy Total energy of isolated system remains constant.

Q: A block of mass m = 7.60 kg is released from rest from point and slides on the frictionless track…

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Q: A soccer player strikes a 428 gram ball with an initial velocity of 27.4 m/s. The ball strikes the…

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Q: Karlus is riding his scooter, and they have a combined mass of 70. At x-0 he has a velocity of 2 and…

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Q: A car of wheat weight 120 kg . To what height should it be raised so that potential energy is 2320…

A: Given data The weight of the wheat car is given as m = 120 kg. The potential energy is given as PE…

Q: At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at…

A: Given Data :initial speed u = 0 msinitial height hi  = 2.55 mlet v denotes the speed at the bottom…

Q: You throw a 20-N rock vertically into the air from ground level. You observe that when it is 15.0 m…

A: Given Data Weight of the rock is W=20 N Height of the rock from the ground is h=15.0 m Speed of the…

Q: A meteorite has a speed of 95.0 m/sm/s when 850 kmkm above the Earth. It is falling vertically…

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Q: At Schlitterbahn, a 75.0 kg person rides a 12.0 m high water slide. If dissipative forces do -6.25 x…

A: Visualize the Problem:

Q: power

A: Given: Mass of the dragster = 650 Kg initial speed = 0 final speed = 110 m/s Distance= 400 m…

Q: A mechanic pushes a 2400 kg car from rest to a speed of v, doing 5746 J of work in the process.…

A:

Q: 8.0-kg block is

A: 63.97 J

Q: The tree topper is accidentally knocked off of a Christmas tree giving it an initial speed of 15…

A: In  this question, mass of the ornament is not given. Therefore, the speed of the ornament is…

Q: A 3.5 kg block starts with a speed of 16 m/s at the bottom of a plane inclined at 41° to the…

A: (a) suppose the block moves through a distance d. The net work done along the direction of the…

Q: How much work must be done by frictional forces in slowing a 1000.0 kg car from 19.8 m/s to rest?…

A: Given data:  Mass (m) = 1000.0 kg Initial velocity (Vi) = 19.8 m/s Final velocity (Vf) = 0 m/s…

Q: A 60.0 kg skier with an initial speed of 12.0 m/s coasts up a 2.50-m—high rise.  Find her final…

A: skier weight=60.0 kg speed of skier= 12.0 m/s height= 2.50 m coefficient of friction= 0.0800 angle…

Q: Starting from rest, a 1.7x10 kg flea springs straight upward. While the flea is pushing off from the…

A: Given that,  Mass of flea, m=1.7×10-4 kg The initial speed of flea, vi = 0 m/s Upward force, F=0.35…

Q: 4. This Olympic skeleton athlete slides down an icy track head first. The track has many twists and…

A: The total energy at the top will be the potential energy of the athlete. The athlete needs to…

Q: At Schlitterbahn, a 75.0 kg person rides a 12.0 m high water slide. If dissipative forces do -6.25 x…

A: Given m=75kg h=12m Ed=-6.25*10^3J To find the velocity at the bottom of the slide :

Q: A 1000-kg car accelerates from 0 to 15 m/s in 5.0 s with negligible friction and air resistance.…

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