A 1.5 m high person is holding a 20 kg trunk on his head and is standing at a roadways bus-terminal. How much work is done by the person?

Q: A boy rides a bicycle a distance of 10 m, carrying a bag which weighs 50 N. What is the work done on…

A: Force, F = 50 NDisplacement, d = 10 m The work done on the bag will be given by the formula W = F.d…

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: An object with a mass of 12.1 kg slides on a frictionless surface at 1.48 m/s. How much work must be…

A: Recall work-kinetic energy theorem. W=change in KE

Q: A horizontal rope with 15 N tension drags a 25 kg box 2.0 m to the left across a horizontal surface.…

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Q: A mass of 8 kg is traveling at a constant 10.8 m/s when a 39 N force, F, starts to act in the…

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Q: When released, a 100-g block slides down the path shown below, reaching the bottom with a speed of…

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Q: How much work does a 69 kg person do against gravity in walking up a trail that gains 760 m in…

A: Work is a physical amount due to an outside force acting on a body to change position from a initial…

Q: A mass of 8 kg is traveling at a constant 10.9 m/s when a 32 N force, F, starts to act in the…

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Q: An apple weighing 1 N falls throughas a distance of 1 m. How much work is done on the apple by the…

A: weight of apple(W)= 1N Distance(d)=1m Work done=F.d=Fdcosθ F is force θ is angle between force and…

Q: A force 50 N is required to maintain a spring stretched from its natural length 9 cm to a length of…

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Q: How much work is done by a 59 kg ninja watrior in climbing a ladder that is 9 meters long? Express…

A: Mass of ninja warrior (m) = 59 kg  Length of ladder (L) = 9 m

Q: Why do you do no work on a 25-kg backpack when you walk a horizontal distance of 100 mm?

A: When a person is carrying a backpack, the weight of the backpack is in the vertical direction. But…

Q: a 1.60 m tall person lifts a 1.65 kg book off the ground so it is 2.20 m above the ground. what is…

A: Given Data Height of the person is h=1.60 m Mass of the book is m=1.65 kg Final height of the book…

Q: How much work is done in moving an object of mass 1 kg to a height of 4 m? (g. 9.8 m/s )*

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

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Q: A student of mass 50 kg caries a bag weighing 4000g from the ground floor to his class on the first…

A: Work done by boy = Change in potential energy  Potential energy at some height H = E  = MgH Where M…

Q: A ball of 0.1 kg is dropped from rest. When it falls through a distance of 2 m, the work done by the…

A: The expression for work done is, W=F×d                                    F=force,d=dispalcement…

Q: A 75 kg person, originally at rest, sleds down a 50 m tall hill and comes to a stop. How much work…

A: Given Mass of person is m= 75 kg Height of hill is h= 50 m Acceleration due to gravity is g= 9.80…

Q: A middle school kid is pushing a lawn mower with 60 N of force at an angle 31 degrees below the…

A: Here, applied force(F) = 60 N displacement(S) = 400 m The angle(θ) between the applied force and…

Q: How much work is done lifting a 100 N barbell vertically 0.5 m?

A: The workdone in lifting a 100 N barbell vertically 0.5 m. given,Force(F)=100 Nheight(h) moved=0.5 m

Q: A person is about to carry a 50 kg sack of rice on top of his head while walking for 20 meters…

A: Option B is correct  Work done on sack of rice is 0 joules.

Q: A cable with mass ½ kg/meter is lifting a load of 150 kg that is initially at the bottom of a 50…

A: The formula for the work done is: The work done required to lift the load only is:

Q: Why is it tiring to push hard against a solid wall even if no work is done? A 75 kg firefighter…

A: Q 1) We get tired because we use our energy to contract the muscles. We try to push the wall using…

Q: A hill is 100 m long and makes an angle of 12° with the horizontal. As a 50-kg jogger runs up the…

A: Given : Length of the hill, l = 100 m The hill makes an angle of 12 degrees with the horizontal.…

Q: A middle school kid is pushing a lawn mower with 46 N of force at an angle 31 degrees below the…

A: Force = F = 46 N Displacement = S = 350 m The diagram is given below:

Q: An 0.5 kg object is initially located at a height 2.5 m was kicked vertically upward to a height of…

A: The work done is given by  W = F s cos A  where, F is the force, s is the displacement and A is the…

Q: How much work is done by a table as it holds up a 3.8 kg cat? Your answer: O OJ 3.8 J 37 J The…

A: The work done to hold up a cat on the table is the potential energy due to the gravitational force.…

Q: A mouse of mass 176 g falls 92 m down a vertical mine shaft and lands at the bottom with a speed of…

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Q: You are working on a construction job and the boss asks you to hold a piece of plywood up at a…

A: Given: The weight of the wood is 34.1 N. The vertical displacement of the object is 1.27 m. The time…

Q: A crate that has a mass of 20 kg is raised 10 meters above the ground. How much potential point…

A: Potential energy comes due to height only. Its value is given by  P.E.- mgh  m - mass of the object…

Q: A chain 72 meters long whose mass is 27 kilograms is hanging over the edge of a tall building and…

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Q: Ramon is driving along the highway in a 976 kg car. He initially drives at 64.2 m/s. After 34.5 s,…

A: Work done by car  W = F.s Cosθ. W = Fs Cos 90 W =0J  Car is moving on horizontal road where effect…

Q: If a 1000 kg car is exiting a highway through an above-the-ground ramp of 5.0 m radius at 12 m/s,…

A: The given values are, m=1000 kgr=5.0 mv=12 m/s

Q: A body of mass 20 kg is lifted up through a height of 4 m. How much work is done? (take g = 9.81…

A: Given data,                    Mass, m = 20 kg                   height lifted, h = 4 m         Only…

Q: You lift a 3kg pumpkin to a height of 0.80 m to check it out. How much work do you do on the pumpkin…

A: Mass of pumpkin m=3 kg The height to which the pumpkin is lifted h=0.80 m The acceleration due to…

Q: How much work is done lifting a 200 N barbell vertically 0.5 m?

A: The weight of the barbell, Fg = 200 N The distance for which the barbell is lifted vertically, d =…

Q: A man pushes a 15 kg box from rest to a speed of v, doing 200 J of work in the process. During this…

A: Work = FS  F = Work/S = 200/6 = 33.33 N  Now , a = F/m = 33.33/ 15 = 2.22 m/s^2 Now,  by  V^2 =…

Q: A 2.2 kg object is initially moving at 5.78 m/s. After a time of 4.9 s, the object is moving at a…

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Q: While carrying a 20 N box, a 500 N girl runs up the staircase to a 5 m higher. What is the work done…

A: Given data The weight of the box is given as Fwb = 20 N. The weight of the girl is given as Fwg =…

Q: How much work is done in moving an object of mass 1 kg to a height of 4 m? (g. 9.8 m/s ).

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Q: How much potential energy does a 20kg cat sitting on the top of a 15m tall tree have (assume g-10…

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Q: How much force is exerted by the Soccer player in pushing the ball to the goal, having the work done…

A: Given data The work done by the soccer player is given as W = 75 J. The distance covered by the ball…

Q: If a car of mass 1200 kg is moving along a highway at 120 km/h, what is the car’s kinetic energy as…

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Q: A mouse of mass 20.0 g falls 160 m down a vertical mine shaft and lands at the bottom with a speed…

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Q: A rock weighs 700 g and has a potential energy of 1 500 J. What height is it found at?

A: The solution can be given as :-

Q: A 1.6 m tall man lifts 2.1 kg box from the ground to a height 2.2 m above the ground. What is the…

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Q: The mass of a baseball is 148 g. How much work does a Major League pitcher do on the baseball when…

A: given:Mass of the ball = 148 gInitial velocity of the ball = 0Final velocity of the ball = 40.2 m/s