Determine the power a hiker of mass - 60 kg must have to carry up a 20 kg backpack up a hill of height h-20 m in timet-4 s. O 9 kW O 6 kW O 10 kW 4 kW

Q: A car engine accelerates a 1000 kg car from rest to 14 m/s in 6.5 s. How much power does the engine…

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Q: How much work does air resistance do on a 1.5 kg ball dropped from 1 meter if the speed right before…

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Q: 7. A motor and cable apparatus lowers an elevator that is initially moving downward until the…

A: Given:An elevator moving downward with an initial velocity of vo from the height y.

Q: A 650 kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a…

A: Given, vf= 110 ms, d=400 m, fk=1200 N, vf= 0 ms, t=7.30 s…

Q: An archer retracts the bowstring 0.400 m, applying a force that increases from zero to 330 N. How…

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Q: A 5.4 kg textbook is raised a distance of 23.6 cm as a student prepares to leave for school. How…

A: Given : m = 5.4 kg d = 23.6 cm = 0.236 m

Q: how much work are you doing?

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Q: A father pushes his child weighing 100. pounds on a sled on a frictionless surface. How much work…

A: Work done is defined is defined as the product of force and displacement. Again from newton's second…

Q: 1.) A car accelerates from rest with a constant acceleration of 3 ?/?2 over a distance of 10 meters.…

A: The force acting on the car is given by, F=ma Here, m is the mass of the car and a is the…

Q: A 30-kg sledder goes down a 6.0 m high snowy slope from rest, hitting 7.0 m/s as she reaches the…

A: Change in kinetic energy is the difference of final and initial kinetic energy. Kinetic energy is…

Q: 32. A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a…

A: Given that-Mass of the mouse is 200 gInitial speed is 0 m/sFinal speed of ball is 8.0 m/sThe height…

Q: A mother carries a 15 kg child up the stairs to bed. If the stairs have a vertical height of 3.2 m,…

A: The work done by the gravity on the child can be given as

Q: 10. A 15-kg object is dropped from the top of a building. After falling 10 meters, its speed is 12…

A: Given:-  The mass of the object is m = 15 kg. The object dropped from the top of the building. The…

Q: 2 people of the same mass climb the same set of stairs. Person A climbs the stairs in 25s. Person B…

A: Part (a) The work done does not depends on the time taken by both the people. The expression for…

Q: A 2 kg rock is thrown upward, with a speed of 5 m/s and returns to the same spot, with the same…

A: Give Mass m = 2 kg Initial velocity is U = 5 m/s in upward direction.  Final velocity is V = 5 m/s…

Q: a child pulls a box of 6kg a distance of 10 meters along a rough horizontal surface with a…

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Q: How much work is done by the boy pulling his sister 29.0 m in a wagon as shown below? Assume no…

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Q: Calculate the amount work is done by the engine of a 9000 kg truck if it accelerates from 5 m/s to…

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Q: Ffr = 20 N Fapp 200N %D

A: Given, Fapp=200N Ff=20N The net force is in the forward direction (towards Right)=200-20 Net…

Q: A ball tied to a string is being whirled around in a circle. What can you say about the work done by…

A: A ball tied to a string is being whirled around in a circle.

Q: 3. A body moves from point A to point B under the action of a force varying in magnitude as shown in…

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Q: What is the power required to accelerate a 10 kg mass from a velocity of 5 m/s to a velocity of 15…

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Q: QUESTION 20 Three masses (bottom mass 6 kg middle mass 4 kg top mass z kgi are stacked vertically on…

A: The object placed at the top experiences threee forces which are :normal force weight fictious force…

Q: 1) A child pulls on a wagon with a force of 75 N. If the wagon moves a total of 42 m in 3.1 minutes,…

A: Data  we have Force,f=75N distance,d=42m time,t=3.1 min To find Powe,p=?

Q: A block slides 42 m down a ramp that makes an angle of 60° with the ground. Determine the mass of…

A: We have to use the formula W= F * s for this problem