The tree topper is accidentally knocked off of a Christmas tree giving it an initial speed of 15 m/s. The tree topper ornament was initially at a height of 2.2 m above the ground and as it falls it bumps into the leaves and the branches of the tree. If the work done by friction of the leaves on the ornament is 3.6 J, what is the speed of the ornament right as it hits the floor?

Q: During an investigation of kinetic energy, a student was measuring the speed of an object using…

A:

Q: A mass m is thrown horizontally off a cliff from a height h. It leaves the thrower's hand (exactly…

A: Given,Mass,=mHeight=hKinetic energy y direction is change in gravitational energy which is mgh

Q: A 1.3 kgkg book is lying on a 0.80 mm -high table. You pick it up and place it on a bookshelf 2.2 mm…

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Q: A force acts on a particle, which is initially at rest; the force is F=(3i+4j)N. The particle is…

A: (a)The displacement of the particle is given by,…

Q: Solve the following question using the concepts of work and energy: A giant alien invader is…

A: Givend=100 mv=26 m/sm=6.32×104 kgf=2.43×105 Nkinetic energy of alien,E=12mv2  =12×6.32×104 kg×262…

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

A: We are given an athlete sliding down the track. We are given that there is friction and air…

Q: particle is subject to a force that varies with positio V as shown in Figure P7.9. Find the work…

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Q: A child's playground slide is d = 5.0m in length and is at an angle of e= 2.0° with respect to the…

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Q: A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting…

A: Given:            m = 800 kg            v   = 7.5 m/s            h  = 8.7 m            t   =  4 s…

Q: The two masses in the figure are released from rest. After the 3.0-kg mass has fallen 1.5 m, it is…

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Q: 0.46 kg particle has a speed of 5.0 m/s at point A and kinetic energy of 7.5 J at point B. (a) What…

A: using kinetic energy formula and work energy theorem,

Q: what is the total work done by the force over the distance x=0 to x=15.0m?

A: Work done is basically the area under the graph of Force vs displacement!

Q: A 300 g hockey puck is shot across an ice-covered pond. Before the hockey puck was hit, the puck was…

A:

Q: A 0.800-kg particle has a speed of 1.60 m/s at point A and kinetic energy of 7.30 J at point B. (a)…

A: (a).The kinetic energy at A is

Q: In the figure below, a constant external force P = 160 N is applied to a 20-kg box, which is on a…

A:

Q: "Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires…

A: Given, Mass, m = 141 kg  Height, h = 15 m final velocity, v = 5.5 m/s  initial velocity , u = 0 m/s…

Q: samuel has is observing an object. you please determine the work that is done by F = 5i -2j+0k which…

A: Given,Force on the object is Initial point of the object is Final point of the object Displacement…

Q: A baseball pitcher sends a fastball toward the batter with a speed of 40 m/s. The batter swings and…

A: Given:-   The mass of the ball is m = 145 g  The speed of the ball is v = 40 m/s  The distance that…

Q: 34. Go "Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground,…

A:

Q: 4. A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-…

A:

Q: A basketball player makes a jump shot. The 0.600-kg ball is released at a height of 2. 14 m above…

A:

Q: saltwater crocodile (Crocodylus porosus) with a mass of 521 kg, is seen chasing prey and reaching a…

A:

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: 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 baseball is thrown straight up with initial speed ?0. If air resistance cannot be ignored, when…

A: Given that:- A baseball is thrown vertically upward with speed Vo.

Q: Suppose a 425 g kookaburra (a large kingfisher bird) picks up a 70 g snake and raises it 2.1 m from…

A: Given data:  Mass of bird (mb) = 425 g = 0.425 kg Mass of snake (ms) = 70 g = 0.070 kg Height of…

Q: 8.0-kg block is

A: 63.97 J

Q: A child drops a baseball from a treehouse. The ball is at rest just before the child drops it, and…

A: Given: The initial velocity of the object is zero. The final velocity of the object is zero.…

Q: A truck of mass 6,000 kg is traveling along a level road at an initial speed of 25 m/s. The driver…

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Q: A 0.41-kg particle has a speed of 3.0 m/s at point A and kinetic energy of 8.0 J at point B. (a)…

A: (a) Calculate the kinetic energy at point A. KEA = 0.5*m*vA2          = 0.5*0.41*32       = 1.85 J

Q: A particle of mass m moves along the x axis. Its position varies with time according to x = in…

A: