In the figure, the rock weighs 115 lb and is lifted 1 ft by the lever. F Fulcrum 3F 3d (a) How much work is done? ft-lb (b) The other end of the lever is pushed down 3 ft while lifting the rock. What force had to act on that end? lb

In the figure, the rock weighs 115 lb and is lifted 1 ft by the lever. F Fulcrum 3F 3d (a) How much work is done? ft-lb (b) The other end of the lever is pushed down 3 ft while lifting the rock. What force had to act on that end? lb

Name: In the figure, the rock weighs 115 lb and is lifted 1 ft by the lever
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: In the figure, the rock weighs 115 lb and is lifted 1 ft by the lever.FFulcrum3F3d(a) How much work is done?ft-lb(b) The other end of the lever is pushed down 3 ft while lifting the rock. What force had to act on that end?Ib

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Conservation Of Energy

Section: Chapter Questions

Problem 29P

See similar textbooks

Related questions

Q: An archer pulls a bow string back 0.40 meters by exerting a force that increases linearly from zero…

A: Given: The extension in the string is 0.40 m. The force exerted by the string is 460 N.…

Q: How much work does an elevator motor do raising a mass of 1176 kg vertically 15.3 m? I solved this…

A: To raise the mass the elevator motor must work against gravity. From conservation of energy the work…

Q: A 42 N horizontal force is applied to a 5.5 kg box. The box moves a horizontal distance of 650 cm.…

A: Mass of box , M= 5.5 kg Force applied onto it , F=42 N Distance moved by box in the direction of…

Q: person lifted a bag of groceries 2.89 m from the floor onto a counter top using a constant force of…

Q: A man pushes a lawn mower on a level lawn with a force of 210 N. If 40% of this force is directed…

A: Work done = force component in direction of displacement × displacement

Q: A man pushes a lawnmower on a level lawn with a force of 193 N. If 40% of the force is directed…

A: Given: The force is F=193 N The horizontal force is FH=40100F=0.4×193 N=77.2 N The displacement is…

Q: The old oaken bucket that hangs in a wall has a mass of 6.75 kg. We slowly pull it up a distance of…

Q: A box is lifted vertically 1.5 m and is then held there. The box has a weight of 100 N. Ignore…

A: Work done on a body is given by, Work = force × displacement W = (Mg) × ( h) = Potential energy at…

Q: A 5.0 kg object is moving forward with an applied force of 10.0 N right, displacing 5.0 m right. The…

A: Total work done due to force of gravity on the object is ZERO. NO WORK IS DONE BY FORCE OF GRAVITY…

Q: A 10 ft. pole weighs 30 Ibs. (of force, to be clear). It lies flat on the ground. You lift one end…

A: Given,

Q: A helicopter lifts a 100kg crate straight up via cable, with an acceleration of 0.8m/s2. If the…

A: Given data The mass of the crate is m = 100 kg. The acceleration of the cable is a = 0.8 m/s2. The…

Q: A variable force of 7x-2 pounds moves an object along a straight line when it is x feet from the…

A: Solution

Q: A horizontal force of 420 N is used to push a crate for 5 m across a level warehouse floor. How much…

A: The force’s work done on the crate can be represented as, Here, F, d, and θ represent the applied…

Q: A force of 90N is required to keep a spring stretched 5m from the equilibrium position. How much…

Q: A gardener pushes a mower a distance of 900 m in mowing a yard. The gardener exerts a force of 35.0…

A: The magnitude of the force on the mower, F=35.0 N The angle between the direction of the force and…

Q: A man pushes a lawn mower on a level lawn with a force of 185 N. If 48% of the force is directed…

Q: A 1080 kg car accelerates at a rate of 2.1 m/s/s over a distance of 18 meters. How much work was…

A: Given, mass of the car, m = 1080 kg acceleration of the car, a = 2.1 m/s2 distance traveled, d = 18…

Q: A man pushes a lawn mower on a level lawn with a force of 194 N. If 49% of this force is directed…

A: Consider a man applied force F on a lawnmower and it displaces by a distance d.

Q: Suppose it takes a force of 30 N to hold a spring that has been stretched from its natural length of…

A: Force on spring F = Kx.... (1) K= spring constant x=…

Q: A 4 kg crate sitting on a horizontal surface is pushed 30 m by a force of 6N applied at an angle of…

Q: A 2 kg crate sitting on a horizontal surface is pushed by a horizontally applied force of 8N. If it…

A: From Newton’s second law of motion, determine the acceleration of the crate as follows. ∑F=maa=∑Fm=8…

Q: Work is done while lifting a 200.0 N barbell 0.75 meters over your head. Given this information, how…

A: Given Data: The lifting force is, F=200.0 N The distance between barbell and your head is, d=0.75 m…

Q: A child pulls a sleigh up the incline as shown below. The work done by gravity on the sleigh during…

A: Given data: A child pulls a sleigh up on the inclined surface The length of the inclined plane = L…

Q: 2. A 100 Newton force is applied to a 15kg box in the horizontal direction and moves it E meters…

A: Given F = 100 N Displacement S = 5 m Mass m =15 kg

Q: A weight lifter raises a 89 kg barbell to a height of 1.9 m. what is the barbell's potential energy?…

Q: A horse pulls a plow a distance of 11 m along the ground from (0, 0) to (11,0), during which a force…

A: distance moved (d) = 11 m along the ground Force (F) = 735 N angle (θ) = 10o with respect to the…

Topic Video

Question

In the figure, the rock weighs 115 lb and is lifted 1 ft by the lever.
F
Fulcrum
3F
3d
(a) How much work is done?
ft-lb
(b) The other end of the lever is pushed down 3 ft while lifting the rock. What force had to act on that end?
Ib

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1 :Introduction

VIEW

Step 2 :Calculation of the work done

VIEW

Step 3 :Calculation of the applied force

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

The surface of the preceding problem is modified so that the coefficient of kinetic friction is decreased. The same horizontal force is applied to the crate, and after being pushed 8.0 m, its speed is 5.0 m/s. How much work is now done by the force of friction? Assume that the crate starts at rest.
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
As a young man, Tarzan climbed up a vine to reach his tree house. As he got older, he decided to build and use a staircase instead. Since the work of the gravitational force mg is path Independent, what did the King of the Apes gain in using stairs?
(a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a speed of 15.0 m/s, neglecting friction? (b) How long will this acceleration take if the car also climbs a 3.00-m-high hill in the process?
A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people ‘would it take to nm a 4.O0-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?
Calculate the power output needed for a 950-kg car to climb a 2.00 slope at a constant 30.0 m/s while encountering wind resistance and friction totaling 600 N.
A certain automobile engine delivers 2.24 104 W (30.0 hp) to its wheels when moving at a constant speed of 27.0 m/s ( 60 mi/h). What is the resistive force acting on the automobile at that speed?
Answer yes or no to each of the following questions. (a) Can an objectEarth system have kinetic energy and not gravitational potential energy? (b) Can it have gravitational potential energy and not kinetic energy? (c) Can it have both types of energy at the same moment? (d) Can it have neither?
The force F(x) varies with position, as shown beolow Find the work done by this force on a particle as It moves from x=1.0 m to x=5.0 m.
What is the dominant factor that affects the speed of an object that started from rest down a frictionless incline if the only work done on the object is from gravitational forces?
What average power is generated by a 70.0-kg mountain climber who climbs a summit of height 325 m in 95.0 min? (a) 39.1 W (b) 54.6 W (c) 25.5 W (d) 67.0 W (e) 88.4 W
A sled of mass 70 kg starts from rest and slides down a 10 incline 80 m long. It then travels for 20 m horizontally before starting back up an 8° incline. It travels 80 m along this incline before coming to rest. What is the magnitude of the net work done on the sled by friction?