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1.) A truck is to be loaded onto a ship by a crane that exerts an upward force of 31kN on the truck. This force, which is strong enough to overcome the gravitational force and keep the truck moving upward, is applied over a distance of 2m. Find (a) the work done on the truck by the crane, (b) the work done on the truck by gravity, and (c) the net work done on the truck. 2.) During your winter break you enter a "dogsled" race across a frozen lake. This is a race where each sled is pulled by a person, not by dogs. To get started you pull the sled (total mass 80kg) with a force of 180N at 40° above the horizontal. Find (a) the work you do, and (b) the final speed of the sled after it moves Ax = 5m assuming that it starts from rest and there is no friction 3.) A small motor is used to operate a lift that raises a load of bricks weighing 500N to a height of 10m in 20s at constant speed. The lift weighs 300N. What is the power output of the motor?

1.) A truck is to be loaded onto a ship by a crane that exerts an upward force of 31kN on the truck. This force, which is strong enough to overcome the gravitational force and keep the truck moving upward, is applied over a distance of 2m. Find (a) the work done on the truck by the crane, (b) the work done on the truck by gravity, and (c) the net work done on the truck. 2.) During your winter break you enter a "dogsled" race across a frozen lake. This is a race where each sled is pulled by a person, not by dogs. To get started you pull the sled (total mass 80kg) with a force of 180N at 40° above the horizontal. Find (a) the work you do, and (b) the final speed of the sled after it moves Ax = 5m assuming that it starts from rest and there is no friction 3.) A small motor is used to operate a lift that raises a load of bricks weighing 500N to a height of 10m in 20s at constant speed. The lift weighs 300N. What is the power output of the motor?

University Physics Volume 1
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
Problem 81AP: Repeat the preceding problem, but this time, suppose that the work done by air resistance cannot be...
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1.) A truck is to be loaded onto a ship by a crane that exerts an upward force of 31kN on the truck. This force, which is strong enough to overcome the gravitational force and keep the truck moving upward, is applied over a distance of 2m. Find (a) the work done on the truck by the crane, (b) the work done on the truck by gravity, and (c) the net work done on the truck. 2.) During your winter break you enter a "dogsled" race across a frozen lake. This is a race where each sled is pulled by a person, not by dogs. To get started you pull the sled (total mass 80kg) with a force of 180N at 40° above the horizontal. Find (a) the work you do, and (b) the final speed of the sled after it 5m assuming that it starts from rest and there is no friction moves Ax = 3.) A small motor is used to operate a lift that raises a load of bricks weighing 500N to a height of 10m in 20s at constant speed. The lift weighs 300N. What is the power output of the motor?
Transcribed Image Text:1.) A truck is to be loaded onto a ship by a crane that exerts an upward force of 31kN on the truck. This force, which is strong enough to overcome the gravitational force and keep the truck moving upward, is applied over a distance of 2m. Find (a) the work done on the truck by the crane, (b) the work done on the truck by gravity, and (c) the net work done on the truck. 2.) During your winter break you enter a "dogsled" race across a frozen lake. This is a race where each sled is pulled by a person, not by dogs. To get started you pull the sled (total mass 80kg) with a force of 180N at 40° above the horizontal. Find (a) the work you do, and (b) the final speed of the sled after it 5m assuming that it starts from rest and there is no friction moves Ax = 3.) A small motor is used to operate a lift that raises a load of bricks weighing 500N to a height of 10m in 20s at constant speed. The lift weighs 300N. What is the power output of the motor?
y 10 m F Motor tuco tp
Transcribed Image Text:y 10 m F Motor tuco tp
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