While doing dumbbell curls, a person generated an elbow joint flexion moment of 25.6N while flexing their elbow over 120-degree range. How much mechanical work was done? • If it took the person 0.78 seconds to lift the weight, what is the mechanical power?

Q: The figure shows a ball with mass m = 0.471 kg attached to the end of a thin rod with length L =…

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Q: A 140-lb man carries a 5-lb can of paint up a helical staircase that encircles a silo with radius 20…

A: Total weight is , w=140+5=145 lb  Radius ,R=20 ft  Height or displacement, d=80 ft  We have to find…

Q: Most Earth satellites follow an oval path around Earth, rather than a circular path. The potential…

A: We know that, Total energy of satellite= Kinetic energy+ Potential energy This energy of satellite…

Q: 11. A block of mass mi 2.40 kg is connected to a second block of mass m2 = 1.80 kg, as shown in the…

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Q: • Estimate the cruising altitude of an airplane during a transatlantic flight. If you are a…

A: The cruising height of an air plane during a transatlantic flight is the highest altitude, it is…

Q: Does the centripetal force acting on an object in uniform circular motion do work on the object?…

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Q: 1. The system shown starts at rest with mass A 1.25 m from B (distance h in picture). Mass A is 750…

A: Momentum conservation principle states that when two bodies are moving relative to each other and…

Q: Mr. Cheung tests the performance of his car of mass 1200 kg. The car accelerates from 0 km/h to 100…

A: Given:mass of the car (m) = 1200 kg initial speed (u) = 0 km/hr = 0 m/s final speed (v) = 100 km/hr…

Q: • Two cars are moving. The first car has twice the mass of the second car, but only half as much…

A: The original speed od tge two cars the first V1=3.534m/s And the second V2= 7.068m/s

Q: The figure shows a ball with mass m = 0.471 kg attached to the end of a thin rod with length L =…

A: a)The work done on the ball by the gravitational force at the lowest point is 2.68Jb)The work done…

Q: A metal rod of length L = 5.4 m is free to rotate about a frictionless hinge at one end (see figure…

A: A metal rod which is free to rotate, having length L=5.4m is initially at rest in horizontal…

Q: Explain why the ball is moving faster just before it hits the ground than when it left the bat but…

A: Conservation of Mechanical energy: Total mechanical energy of a closed system remains constant,…

Q: The figure shows a ball with mass m = 0.348 kg attached to the end of a thin rod with length L =…

A: given -   mass of ball (m) = 0.348 kg  and Length of rod  =0.453 m mass of rod = 0 kg

Q: 1• An 1865-kg airplane starts at rest on an airport runway at sea level. (a) What is the change in…

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Q: A patient's foot shown in the figure does contact the floor only at point P (the heel () does not…

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Q: A softball pop fly hits the catcher glove with a vertical velocity of 9 m/s. If the mass of the…

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Q: An object thrown at a certain angle to the ground moves in a curved path and falls back to the…

A: Work done by the force of gravity on an object depends solely on vertical displacement. Vertical…

Q: A block of mass 1.5 kg is at rest on a frictionless floor. A constant force F is subjected to the…

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Q: How much work is done when a 125 g tomato is lifted 13.0 m ? Express your answer with the…

A: Given data m=0.125 kgh=13 m

Q: How much gravitational potential energy (relative to the ground on which it is built) it's stored in…

A: Given: Mass of Egyptian pyramid m=5×109 kg Centre of mass from ground h=24.0 m To find (a)…

Q: A 290-kg load is lifted 24.0 m vertically with an acceleration a=0.180 g by a single cable. -…

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Q: , how much work is done by the man against gravity in climbing to the top?

A: If the acted force is F and for the force displacement is dr then We know work ,…

Q: a 0.4-kg billiard ball is released from a height of 6m and rolls on a frictionless circular track of…

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Q: A 150-lb man carries a 10-lb can of paint up a helical staircase that encircles a silo with radius…

A: The man makes exactly three complete revolutions, therefore the angle is  3×2π=6π The perimetric…

Q: The figure below shows a ball with mass m = 0.330 kg attached to the end of a thin rod with length L…

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Q: Interrupted Pendulum: A mass of 450 g is attached to a light cord (length 1.50 m) that is suspended…

A: Let L denote the length of the pendulum, m denote the mass of the pendulum. Let θ denote the angle…

Q: The figure shows a top-down view of three forces applied to a box. Together, these forces drag the…

A: The total work done on the box is, W=W1+W2+W3=F1dcosθ1+F2dcosθ2+F3dcosθ3

Q: An oxygen cylinder of mass 16.0 kg is pulled up a mountain side at a constant speed of 2.2 m/s by a…

A: Given: Mass of cylinder m = 16.0 kg. Speed of cylinder in upward inclination direction = 2.2 m/s.…

Q: ladder is raised to a vertical position Compute the work done by the force lifting the ladder. The…

A: Weight of ladder,                     Length of ladder,                     The ladder is raised to…

Q: An archer shoots a 200 g arrow with a speed of 200 m/s and an angle with respect to the horizontal…

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Q: An object moves in uniform circular motion. What is the reason the centripetal force does no work on…

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Q: a) A person is riding on a Ferris wheel of radius R. He starts at the lowest point of the wheel.…

A: a) W=F×d×cosθ   Where,  W= work done by the forceF = force appliedd= displacement caused by the…

Q: In which of the following situations would the capacity to do work be greatest? Note: Omega is…

A: The values of mass m , linear velocity v , moment of inertia I and angular velocity w is given  We…

Q: The figure shows two blocks, released from rest, connected by a light string passing without…

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Q: How much work is done by the gravitational force on earth by the sun, as the earth orbits around t

A: Given:- the earth orbits around the sun in a nearly perfectly circular orbit Find:- How much work is…

Q: •39 O A force F = (cx - 3.00x²)i acts on a particle as the parti- cle moves along an x axis, with F…

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Q: In the figure, a constant external force P = 300N is applied to a 20.0 kg box, which is on a rough…

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Q: A basketball is rolling down a hill. When you start watching it, it has a total energy of -11…

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Q: Determine the magnitude of the force that you need to exert on the end of the stick (perpendicular…

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Q: d B) of equal mass and the same Iz roll down a hill without sliding and have the same kinetic…

A: We know that the two wheels of  A and B same mass and the same Iz roll down a hill without sliding…

Q: A 3 kg ball is located of top of a hill that is 1000 m high. The ball starts rolling from rest.…

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Q: If R = 22.3 cm, M = 275 g, and m = 108 g in the figure, find the speed of the block after it has…

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Q: A 60.0 kg person bends their knees and then jumps straight upwards. After your feet leave the…

A: Answer:   Given values, Mass (m)=60 Kgheight (h)=15 cm

Q: A 1400-NN crate rests on the floor. How much work is required to move it at constant speed 5.0 mm…

A: Answer :-  Force (f) = 1400 N  Displacement (S) = 5 mm                                  = 0.005 m…