A 2.8 kg object is dropped, from rest, from a height of 15.5 m above the ground. Assuming air-resistance can be neglected, What is the kinetic energy of the object just before it hits the ground?

Q: A 7.80-g bullet moving at 520 m/s penetrates a tree trunk to a depth of 5.30 cm. (a) Use work and…

A: a)Write the mathematical expression for work energy theorem.

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Q: A 4.3-kg ball is thrown from the top of a 10-m tall building (point A) with a speed of 6 m/s at an…

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Q: A 0.30-kg stone is held 1.2 m above the top edge of a water well and then dropped into it. The well…

A: Dear student The Gravitational Potential Energy is given as : U = mgh Where m = mass g = 9.8 m/s2 h…

Q: Suppose an Olympic diver who weighs 55.0 kg executes a straight dive from a 10-m platform. At the…

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Q: A toad with mass of 188 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: Given: Toad's mass, m=188 g=0.188 kg Toad's jumping angle w.r.t horizontal, θ=35° Initial velocity,…

Q: A 51.0-g golf ball is driven from the tee with an initial speed of 47.0 m/s and rises to a height of…

A: Given mass of golf ball = m = 51.0 g initial speed of ball = u = 47.0 m/s maximum height attained by…

Q: A tennis ball with mass 0.2kg is released downwards vertically with velocity of 15m/s towards the…

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Q: of the cart at each of the following po A: The bottom of the first hill B: The top of the second…

A: Conservation of Energy According to the law of conservation of energy, the total mechanical energy…

Q: A 240-kg roller coaster reaches the top of the steepest hill with a speed of 5.60 km/h. It then…

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Q: When an 78.8-kg adult uses a spiral staircase to climb to the second floor of his house, his…

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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 5.0 kg mortar shell is fired at an angle of 35 degrees with respect to the horizontal and has an…

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Q: In a circus act, a 60 kg clown is shot from a cannon with an initial velocity of 16 m/s at some…

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Q: determine the final speed of the box (in m/s) after sliding across the rough section of fl

A: Decrease in kinetic energy is equal to the work done by friction. Ki-Kf=Wf Here Ki is the initial…

Q: A 2.93 kg object is dropped, from rest, from a height of 13 m above the ground. Assuming…

A:

Q: A sled of mass 30.0 kg is given a kick on a frozen pond, imparting to it an initial speed vi = 4.0…

A: Mass of the sledge, m=30 kg Initial speed of the sled,vi=4.0 ms Final speed of sled , vf=2 ms The…

Q: If a 70 kg baseball player steals home by sliding into the plate with an initial speed of 10 m/s…

A: mass of player, m = 70 kg  initial speed, u = 10 m/s  final speed, v = 0 m/s

Q: A 6860 kg car traveling at 41 m/s is at the foot of a hill that rises 491 m in 1.7 km. At the top of…

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Q: When an 85.4-kg adult uses a spiral staircase to climb to the second floor of his house, his…

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Q: In the figure, a block of mass m = 3.90 kg slides head on into a spring of spring constant k = 320…

A: Given information: Here, m is the block’s mass, k is the spring’s constant, x is the compression,…

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: A 7.80-g bullet moving at 610 m/s penetrates a tree trunk to a depth of 5.40 cm. (a) Use work and…

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Q: A 51.3-g golf ball is driven from the tee with an initial speed of 53.4 m/s and rises to a height of…

A: Given  Mass of ball, M = 51.3 g  Initial speed, u = 53.4 m/s  Ball rises to a height, thus maximum…

Q: A toad with mass of 117 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

A: Given data The mass of the toad is m=117 g The angle of projection is θ=26o The initial velocity is,…

Q: 25 kg bear slides, from rest, 12 m down a Lodgepole Pine tree, moving with a speed of 5.6 m/s just…

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A: Given: Jeep's mass is 1000 Kg Velocity level and hill's height can be 14 m/s and 10m. To find the…

Q: A 7.80-g bullet moving at 620 m/s penetrates a tree trunk to a depth of 5.40 cm. (a) Use work and…

A: Given data The mass of the bullet is m = 7.80 g = 0.0078 kg The initial velocity of the bullet is: u…

Q: total mechanical energy

A:

Q: A box of unknown mass is sliding with an initial speed vi = 6.00 m/s across a horizontal…

A: GIVEN         Intial velocity of box =vi= 6.0m/s        length of Rough section of floor=d=2.8m…

Q: A rollercoaster with a mass of 3500 kg goes over its first hill with a speed of 15 m/s. The first…

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Q: A toad with mass of 180 g leaps into the air to catch a fly. If the toad's jump was at an angle of…

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Q: A 492 kg rollercoaster car starts at rest atop a 38-meter hill. Find the total mechanical energy,…

A: Given data:  Mass (m) = 492 kg Initial velocity (v) = 0 m/s Height of first hill (h) = 38 m Height…

Q: A 3.13 kg object is dropped, from rest, from a height of 11.7 m above the ground. Assuming…

A: The required expression for the kinetic energy,

Q: In the figure, a block of mass m = 4.00 kg slides head on into a spring of spring constant k = 230…

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Q: What minimum initial kinetic energy must the boy supply to the package?

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Q: A 3-kg ball is thrown with a speed of 9 m/s at an unknown angle above the horizontal. The ball…

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Q: A 68.5-kg athlete leaps straight up into the air from a trampoline with an initial speed of 8.7 m/s.…

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Q: A box of unknown mass is sliding with an initial speed v₁ = 4.30 m/s across a horizontal…

A: Intial velocity of box = 4.3m/s Rough section of floor=2.8m Coefficient of kinetic friction=0.1 Let…

Q: A 7.80-g bullet moving at 530 m/s penetrates a tree trunk to a depth of 4.50 cm.  (a) Use work and…

A: (a).According to the work energy theorem, the net work done is equal to the change in kinetic energy