Your friend (mass 65.0 kg) is standing on the ice in the middle of a frozen pond. There is very little friction between her feet and the ice, so she is unable to walk. Fortunately, a light rope is tied around her waist and you stand on the bank holding the other end. You pull the rope for 3.00 s and accelerate your friend from rest to a speed of 6.00 m/s while you remain at rest. What is the average power supplied by the force you applied?

Q: A 20.0 kg rock is sliding on a rough, horizontal surface at 8.00 m/s and eventually stops due to…

A: Given that,Mass (M) = 20 (Kg)Initial velocity (u) =8 (m/sec)Final velocity (v) = 0…

Q: A 70-kg secret agent skies down a circular hill (radius      15 m) and grabs a 20 kg bag, then flies…

A: Given information: The mass of the agent (M) = 70 kg The radius of the circular hill (R) = 15 m The…

Q: You are holding a 1 kg rock and standing at the top of a cliff. You drop the rock off the cliff and…

A:

Q: A 67 kg yak has an average power output of 200 W. How long can a yak climb a 3km high mountain?…

A:

Q: A 64.0 kg man, standing on a frictionless walkalator inclined at θ=33.0° below the horizontal, holds…

A:

Q: A 8.79-kg particle is subject to a net force that varies with position as shown in the figure. The…

A: Part a:  answer: 1.306 m/sec  Part b:  answer: 2.263 m/sec   Part c:   answer: 2.613  m/sec  Thank…

Q: A 45.0 kg student climbs a 5.45 m long rope and stops at the top. What must her average speed be to…

A: The work done by the student is equal to the change in gravitational potential energy. Hence,  W=mgh…

Q: A constant 81.8-N force acts on a 3.70-kg box. The box initially is moving at 11.3 m/s in the…

A: Applying Work-Kinetic Energy theorem:- Work done by the force(W)=Change in KE of the object Hence,…

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

A: Given: The mass of the helicopter is 860 kg. The initial speed of the helicopter is 0 m/s. The final…

Q: A 20 N object is lifted a distance of 5.0 meters. The object has 100.0 N of potential energy. True…

A: Potential energy is weight times the displacement in that direction. PE = W × h

Q: ck with a mass of 4 kg is sliding across a horizontal surface with an initial speed of 5 m/s.…

A:

Q: An 8.0 kg object is moving in the +x-axis direction. When it passes through x = 0, a constant force…

A: Given, m = 8 kg when x = 0 m, K1 = 30 J K = 0.5 mv2   therefore, v12 = 2K/m v1=2Km = 2×308 = 2.74…

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: A 83.5 kg man walks up a set of stairs in 11.7 s. The man rises 4.5 m in going up the stairs. What…

A: Write the expression for the work done by the man to climb a set of stairs and substitute the…

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

A: The answer is below

Q: Consider a system of a cliff diver and the Earth. The gravitational potential energy of the system…

A: Given that gravitational potential energy of the system decreases by 26,000 J so that PE=26000 J…

Q: A 41.1 kg sled coasts down a hill, starting from rest. The hill is inclined at an angle of 25.9…

A: Required : The work done on the sled by the gravitational force.

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

A: Given that: The mass of the helicopter is m=710 kg The initial velocity is u=0 m/s The final…

Q: A 64.0 kg man, standing on a frictionless walkalator inclined at =33.0° below the horizontal, holds…

A:

Q: A 600-N Marine ir 10.0-m vertical ro rc

A: Given: Force, F=600 N Distance=10 m time=8 sec

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

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: A 8.36-kg particle is subject to a net force that varies with position as shown in the figure. The…

A:

Q: Three objects with masses, m₁ = 8.0 kg, m₂ = 10.0 kg, and m3 = 19.0 kg, are attached by strings over…

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 teenager is taking a 'Bird' scooter out for a joyride. He decided he wants to take the scooter to…

A: Given- mass of boy , m= 65 kg  Height of hill , h = 30 m As boy starts from rest , hence his initial…

Q: A (6.40x10^1) kg woman runs up a flight of stairs in 5 s. Her net upward displacement is 5 m. What…

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Q: 13. A fighter jet is launched from an aircraft carrier with the aid of its own engines and a…

A:

Q: A 57.7 kg man walks up a set of stairs in 11.6 s. The man rises 4.2 m in going up the stairs. What…

A: Given,  mass of the man , m = 57.7 kg  time , t = 11.6 s height, h = 4.2 m  Power = Worktime The…

Q: A 1400 kg car starts from rest and accelerates uniformly to 19.5 m/s in 20s. a)Find the average…

A:

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

A: Mass of helicopter M= 780 kg Iniatial speed of helicopter u = 0 Final speed of helicopter v= 10.0…

Q: A 55.5 kg man walks up a set of stairs in 10.2 s. The man rises 4.5 m in going up the stairs. What…

A: Given Data Mass of man, m = 55.5 kg height, h = 4.5 m Time taken, t = 10.2 s Average power (in…

Q: A 64.0 kg man, standing on a frictionless walkalator inclined at θ=33.0° below the horizontal, holds…

A: Mass of the man M=64 kg, mass of the grocery cart m=12.8 kg, inclination of the walkalator below the…

Q: A rider of mass 40 kg sits on a sled of mass 10 kg at the top of the hill that is 15 m above level…

A:

Q: total mechanical energy

A:

Q: A crate on a motorized cart starts from rest and moves with a constant eastward acceleration of a =…

A: Given: A crate on a motorized cart starts from rest and moves with aconstant eastward acceleration…

Q: Mark pushes his broken car 150 m down the block to his friend’s house. He has to exert a 110 N…

A:

Q: Problem 1: A skier of mass 70 kg if pulled up a slope by a motor-driven cable. (a) How much work is…

A:

Q: A football player is dragging a 100 kg sled across an Astroturf field at a constant speed of 5 m/s…

A: Mass is sled (m) = 100kg  Velocity (v) = 5m/s Tension in the rope is (F) = 500N

Q: A 1,452 kg sports car accelerates from rest to 27.1 m/s in 12.3 s. What is the average power output…

A: Given data: Mass of sports car is, m=1452 kg. Initial speed of car is, u=0 m/s…

Q: How much work must you do to push a 12 kg block of steel across a steel table at a steady speed of…

A: mass of block of steel (m) = 12 kg constant speed (v) = 1.3 mstime (t) = 7.7 seconds μk = 0.6

Q: 5.1. A 5.0 kg weight falls past a window that is 1.5 m in vertical length. (a) How much work does…

A: Mass of weight,                   Height of window,

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

A: