The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert a force of approximately 800 N as it contracts a distance of 7.5 cm in a 75-kg male. 3 How much work can the biceps muscles (one in each arm) perform in a single contraction? Compare this amount of work with the energy required to lift a 75-kg person 40 cm in performing a chin-up. Do you think the biceps muscle is the only muscle involved in performing a chin-up?

Q: 3. A boy pulls a 27.0-kg box with a 170-N force at 33° above a horizontal surface. If the…

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Q: You throw a 20-NN rock vertically into the air from ground level. You observe that when it is a…

A: Given:                 weight of rock                               W= 20N             height to…

Q: 5. A box of mass 6.80 kg is pulled from rest up a 46.0 m long incline that makes an angle of 20.0°…

A: mass = m = 6.8 kgdisplacement = 46 mfinal speed = V = 4.35 m/sinitial speed = V0 = 0 m/s

Q: 900 N box is pushed up an inclined plane that is 6.0 m long. It requires 3900 J of work to get the…

A: kinetic energy at bottom= kinetic energy at top=0 as as bottom and top the speed is zero. potential…

Q: A boy pulls a 30.0-kg box with a 130-N force at 33° above a horizontal surface. If the coefficient…

A: Given:- The mass of the box m = 30 kg  pulling force F = 130 N at 33o above a horizontal surface…

Q: 1. The figure to the right shows a mall shopper pushing on a 11.0 kg grocery cart by constant force…

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Q: You do 14 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched. How…

A: Given data: Work (W) = 14 J Spring constant (k) = 190 N/m Initially spring is unstretched Required:…

Q: How much work, in joules, must you do to lift an elephant weighing60 000 N up 1.5 m onto the back of…

A: The objective of this question is to calculate the amount of work done in lifting an elephant onto…

Q: A 100 kg crate slides 10.0 m down a 40 degree incline. The coefficient of friction is 0.20. What is…

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Q: Skylar pulls a 6.00-kg crate across a horizontal floor for a distance of 2.6 m as shown. The tension…

A: Given data:  Frictional force (F) = 19 N Distance (d) = 2.6 m Angle between frictional force and and…

Q: 1. How does the work required to stretch a spring 2.0cm from Its unstressed length compare with the…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The…

A: Given data:  Work done (W) = 350 J Height (h) = 9 m Required: Mass (m)

Q: 2. A rollerskate is dragged across the ground for 3.4 meters, by someone pulling on its shoelace.…

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Q: angle between the force and direction of motion c

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Q: 3. A sled of mass 70 kg starts from rest and slides down a 10° incline 70 m long. It then travels…

A: The work done by the system on the sled is W=700.76 J

Q: A coin starts from rest and slides down an incline. It then slides horizontally on the table until…

A: Initially, when the coin is at rest on the incline, total energy is equal to the potential energy.…

Q: 1. If you pushed a 20 kg box across the floor for a distance of 60 m with a force of 15 N how much…

A: #1 Given data: The mass of box is m=20 kg. The distance traveled by the box is d=60 m. The force…

Q: Part A You pick up a 2.5 kg can of paint from the ground and lift it to a height of 1.3 mi How much…

A: The 2.5 kg can of paint has a weight given as F=mgF=2.5×9.8F=24.5 N This weight of the can is the…

Q: Michael pulls a cart 30 m along a sidewalk with a tension force of 80 N. The force is directed 25⁰…

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Q: There is a 100 kg box that starts at rest. a person pushes that box over the course of 18 meters…

A: Given mass of box m = 100 kg initial speed u = 0 m/s final speed v = 10 m/s displacement x = 18 m…

Q: 3.Starting from the rest and height of 8 m, a 3 kg object slides down a 30° m incline, reaching the…

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Q: A child sets a 2.5 kg block in motion by giving it a push along a floor. This gives the block a…

A: Given: The mass of the block is m=2.5 kg The initial velocity of the block is u=0 m/s The final…

Q: 4. A body moves a distance of 10 m under the action of a force that has a constant value of 5.5 N…

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Q: 1. A bungee cord exerts a non-linear elastic force of magnitude: F(x)=K₁X+K₂x³ where x is the…

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Q: A 240 kg cable that is 100 m long hangs vertically from the top of a tall building. a. How much work…

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Q: How much work is required to lift a 6 kg object from the bottom of a  10 meter deep well?

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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: I 2. A75 kg painter climbs a ladder that is 2.75 long leaning against a vertical wall. The ladder…

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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: An elevator is lifted by its cables at a constant speed. Is the total work done on the elevator…

A: If the elevator lifted by cables on the elevator two forces are acting 1) gravitational force…

Q: Two people use ropes to pull identical sofas up to their neighboring 5th floor apartments. One pulls…

A: t1=100 sect2=20 secLet the mass of the blocks is m and height of the floor is h. The change in…

Q: A typical muscle fiber is 2cm long and has a cross-section area of 3.1x10^-9m^2. When the muscle…

A: Work don by muscle is  W = Force × Change in length      = F × dr.

Q: 2: The only force acting on a 2.0 kg object as it moves along the x axis is given by F, (-2.0 x) N,…

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Q: What is the potential energy in J of a bungee jumper standing on a 0.109 km bridge that weighs 85…

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Q: Early in October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 3-2kg…

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Q: A grocery cart with a mass of 10 kg is being pushed at constant speed up a 25° ramp by a force Fp…

A:

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.