As a ball falls under the influence of gravity, does gravity do positive work or negative work? Provide a mathematical explanation.  I know answer is positive but what is the equation, thanks!

Q: 1. A snowboarder is performing tricks on a half-pipe. The half-pipe has a vertical height of 7.0…

A: A half pipe is a semicircular arc used for snowboarding. Both ends have same height. We are given…

Q: 2. Which situation demonstrates a positive work done? Group of answer choices A basket being lifted.…

A: Case 1 Work is done by man against gravity When basket being lifting Case 2 No work done by boy…

Q: To make a batch of cookies, you mix half a bag of chocolate chips into a bowl of cookie dough,…

A: Here's the information that we need to use: FF is the applied force vv is the speed ΔtΔt is the…

Q: 1. A 0.14 k-g pine cone falls 16m to the ground, where it lands at a speed of 13 m/s. (a) With what…

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Q: . A 1100-Kg car coasts on a horizontal road with 19 m/s. After crossing an unpaved, sandy stretch of…

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Q: 4. You lift your pet cat vertically by 2.0 m, and then you lower it vertically by 2.0 m. During this…

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Q: 1. Two blocks are connected by a very light string passing over a massless and frictionless pulley.…

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Q: As I carry a box up a flight of stairs, am I doing positive work or negative work on the box?…

A: When you carry a box up a flight of stairs, the force is in the direction of the displacement. Hence…

Q: 3. A 280 kg. piano is being lifted a steady speed to an apartment above the ground. The carne…

A: According to guidelines we need to solve only first question kindly repost other questions in the…

Q: 2. Can the work done by the force of kinetic friction on an object ever be positive? If "yes," give…

A: Kinetic friction force : kinetic friction exist between two contact surface only when there is…

Q: 1. KitKat has just caught an insect and decides to bring it with pride to his human owner. A…

A: Power is defined as P=F→·v→ Here F→ is force and v→ is velocity. Work done is W=Pt Here P is power…

Q: 1. A pitcher throws a ball at 90 mi/h, and the catcher stops it in her glove.(a) Is the work done on…

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Q: As a woman carries her suitcase up a flight of stairs, she does work against gravity. If the mass of…

A: mass of suitcase (m) = 10 kg Height of stairs (h) = 12 m g = 9.8 ms2

Q: 40. A car without gas is pushed along a horizontal concrete road with a constant amount of force by…

A: From Newton's laws of motion we have,  F=ma Here, F is the applied force, m is the mass and a is the…

Q: 2. a) A ball has an initial speed external forces act on the ball. After these forces act, the speed…

A: Values given in the question are as follow; Initial speed of ball, v0=4ms first halving of speed,…

Q: 1. Draw a situation where a force is doing zero work. Explain why the force is doing no work,…

A: To explain a situation where work done by a force is zero.

Q: 1. Two blocks are connected by a very light string passing over a massless and frictionless pulley.…

A: Given:-  Two blocks are connected with the string and pulley and the weight of the W1= 12 N block is…

Q: 19. An object moving along the x axis is acted upon by a force F that varies with position as shown.…

A: The work done is given by the expression,

Q: A man wishes to pull a crate 15m across a rough floor by exerting a force of 100 N. The  coefficient…

A: Assume that the angle between horizontal and the force applied by the man be θ. Draw the free-body…

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: person pushes a box up an incline with constant force, and after calculating how much work they did…

A: Given work done by the person is greater than the work done by gravity. When we move a body on an…

Q: Find the work done in joules by gravity as an object of the mass m-8 kg is raised up at constant…

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Q: Describe a situation in which a force is exerted for a long time but does no work. Explain.

A: We consider a situation when an object lifted at height h is displaced a distance x.

Q: A constant force of 40N in the positive x direction acts on a 4.0-kg object as it moves from the…

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Q: 7. A body of mass 40 Kg covers a distance of 50 m in 5s starting from rest under the influence of a…

A: Given data, Mass of the body m = 40 kg Distance s= 50 m Time t = 5 sec Starting from rest u = 0 m/s…

Q: Can the normal force on an object ever do work? Explain.

A: The work done on any object is given by W=Fd

Q: 11. How much work does Amanda's car experience compared to Bertha's? Amanda and Bertha are in a car…

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Q: 1. A tow rope, parallel to the water, pulls a water skier directly behind the boat with constant…

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Q: A particle moves 5 m in the +x direction while being acted upon by a constant force F = 2i + 5j - k…

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Q: An object is placed to a shelf from the ground which is 1.8 m higher. find out how much work is done…

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Q: 3. Suppose you lift a 20 kg box by a height of 1.0 m. a) How much work do you do in lifting the box?…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…