# Kinetic Energy and Work

## EXERCISES & PROBLEMS KINETIC ENERGY AND WORK

EXERCISES & PROBLEMS  KINETIC ENERGY AND WORK ssm Solution is in the Student Solutions Manual. www Solution is available on the World Wide Web at: http://www.wiley.COm/college/hrw Ilw Solution is available on the Interactive Leaming Ware.  Energy IE. If an electron (mass m = 9.1 1 X 10-31 kg) in copper rear the lowest possible temperature has …

## REVIEW AND SUMMERY KINETIC ENERGY AND WORK

REVIEW  AND SUMMERY KINETIC ENERGY AND WORK Kinetic Energy The kinetic energy K associated with the motion of a particle. Work Work W is energy transferred to or from an object via a force acting on the object. Energy transferred to the object is positive work, and energy transferred from the object is negative work . Work and …

## Sample Problem Kinetic Energy And Work

Sample Problem Kinetic Energy And Work Shows constant forces acting on a box as the box slides rightward across a friction less floor. Force Fr is horizontal, with magnitude  is angled upward by,             (a) What is the power due to each force acting on the box at that instant, and what is …

## Power

Power The time rate at which work is done by a force is said to be the power due to the force. If an amount of work W is done in an amount of time  force, the average power due   the force during that time interval. The SI unit of power is the joule per second. …

## Sample Problem Kinetic Energy And Work

Sample Problem Kinetic Energy And Work Force with x in meters, acts on a particle, changing only the kinetic energy of the particle. How much work is done on the particle as it moves from coordinates (2 m, 3 m) to (3 m, 0 m)? Does the speed of the particle increase, decrease, or remain the same? SOLUTION: The …

## Work Done by a General Variable Force

Work Done by a General Variable Force One-Dimensional Analysis Let us return to the situation of Fig. 7-2 but now consider the force to be directed along the x axis and the force magnitude to vary with position x. Thus, as the bead (particle) moves, the magnitude of the force doing work on ft changes. Only the magnitude …

## Sample Problem Kinetic Energy And Work

Sample Problem Kinetic Energy And Work a horizontal friction less counter with speed . It then runs into and compresses a spring of sp ring constant. SOLUTION: There are three Key Ideas here: 1. The work  done on the canister by the spring force is related to the requested distance with replacing x.         …

## Sample Problem Kinetic Energy And Work

Sample Problem Kinetic Energy And Work A package of spicy Cajun pralines lies on a friction less floor, attached to the free end of a spring in the arrangement.An applied force of magnitude. (a) How much work does the spring force do on the package if the package is pulled rightward from 17 mm? SOLUTION: A Key …

## Work Done by a Spring Force

Work Done by a Spring Force We next want to examine the work done on a particle like object by a  articular  variable force-namely, a spring force, the force from a spring. Many forces in nature have the same mathematical form as the spring force. Thus, by examining this one force, you can gain an understanding of …

## Sample Problem Kinetic Energy And Work

Sample Problem Kinetic Energy And Work An elevator cab of mass m = 500 kg is descending with speed when its supposing cable begins to slip, allowing it to fall with constant acceleration. (a) During ‘the fall through a distance d = 12 m, what is the work  done on the cab by the gravitational force. SOLUTION: The …