A 2000 kg rock rolls down a hillside at 40 m/s and crashes into a tree, where it comes to rest. The tree does not move. How much work was done on the tree by the rock? Explain your reasoning. 1.

Q: When a flea (m = 600 μg) is jumping up, it extends its legs 0.5 mm and reaches a speed of 0.50 m/s…

A: According to the kinematics equation, find the acceleration of the flea.Substitute the values,

Q: 1. A crate of mass 10.0 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The…

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Q: A man is carrying a mass m on his head and walking on a flat surface with a constant velocity v.…

A: According to question we need to find work done against gravity.

Q: A force of 25 N acts on the board at an angle of 45°. The board moves a total of 3331111000 inches.…

A: Given data:  Force (F) = 25 N Angle (θ) = 45° Displacement (d) = 3331111000 inches Required: The…

Q: This question has multiple versions. Read carefully! A model helicopter carries a 10kg package from…

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Q: Choose which statement describes a process in which an external force does positive work on the…

A: Have a look dear

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…

A:

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

A: Since both the persons have to climb the same set of stairs, the work done by both the persons is…

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: A man returning from ice fishing trip pulls a sled with fish. Total mass of the sled and fish is…

A:

Q: 7. a. You push a couch across the floor, pushing with a force of 282.5 N horizontally. It slides…

A:

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: Read the introduction to Tutorial 4 in the Tutorial Manual to help you answer the questions below.…

A: Introduction: Work is defined as the product of force and displacement. Energy is defined as the…

Q: a. You push a couch across the floor, pushing with a force of 282.5 N horizontally. It slides…

A: GivenApplied force, F=282.5 NDistance , d=1.47 m

Q: Answer the following questions: a. If you push a lawn mower across a yard in 10 seconds, how does…

A: a. If you push a lawn mower across a yard in 10 seconds, how does the work done compare with pushing…

Q: Please help me with this question; A certain force F= 20N ^i + 40N ^j is applied to an object which…

A:

Q: A 10 kg package is delivered to your house. Use one complete sentence to describe an example of how…

A: SOlution: expain the work done on the book

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: You are using a rope to lift a 14.5 kg crate of fruit. Initially you are lifting the crate at 0.500…

A: Part D) The force of gravity and the direction of movement are opposite to each other. So, the work…

Q: 2. A 1050 J of work is done by a post-person when pushing a parcel with a mass of 33.2 kg with a…

A:

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

A: Let mass of each person = m Weight of each person = mg Time taken by A to climb the set of stairs =…

Q: Dr. B is bouncing a 0.245 kg playground ball in his office one day. He drops the ball from a height…

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Q: A floating ice block is pushed through a displacement d = ( 27.0 m )î – (24.0 m )ĵ along a straight…

A: GivenF→ =(27.0 m)i^ -(24.0 m) j^d→=(298 N ) i^ -(183 N) j^

Q: A. How much work is done by w⃗ ? Express your answer using three significant figures. W =…

A: a)The required work done is,

Q: 5. Two people of the same mass climb the same set of stairs. Person A climbs the stairs in 25 s.…

A: Let the mass of each person = m Let the height of stairs = h Time taken by A = t = 25 s Time taken…

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

A:

Q: 5. Sheryl is driving along the highway in an 894 kg car. She initially drives at a velocity of 50…

A: mass m = 894 kg initial velocity U = 50 m/s after 35/5 sec velocity increases by 70 % of the initial…

Q: 1. If you try to move a heavy anvil for 10 minutes but cannot make it move, have you done any work…

A: 1)duration of time for which the heavy anvil is tried to move = 10 minutes

Q: A force FY shown in the figure below acts on a particle moving along the y axis. Each unit in the…

A: The area under the force displacement graph is work done. a. Work done on the particle from A to B…

Q: A constant 15 N horizontal force is applied to a 15 kg cart at rest on a level floor. If friction is…

A: Given,horizontal force, mass of the cart, distance moved by the crate, initially cart is at rest so…

Q: Two persons weigh same and climb the same flight of stairs. Person 1 takes 3 sec and person 2 takes…

A: Given : Two persons weigh same and climb the same flight of stairs. Person 1 takes 3 sec and person…