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Problem

(II) The momentum of a particle, in SI units, is …

02:21

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Problem 2 Easy Difficulty

(I) A constant friction force of 25 $\mathrm{N}$ acts on a 65 -kg skier for 15. S. What is the skier's change in velocity?


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Related Courses

Physics 101 Mechanics

Physics for Scientists and Engineers with Modern Physics

Chapter 9

Linear Momentum

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Top Physics 101 Mechanics Educators
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Conservative and Nonconservative Forces - Overview

In physics, a conservative force is a force that is path-independent, meaning that the total work done along any path in the field is the same. In other words, the work is independent of the path taken. The only force considered in classical physics to be conservative is gravitation.

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Kinetic Energy - Overview

In physics, the kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest. The kinetic energy of a rotating object is the sum of the kinetic energies of the object's parts.

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Video Transcript

the average force is given by the rate of change momentum. Delta P A riddle to tea on DSO Delta P is just mass times the raid times of change in velocity on That's divided by Delta two. Okay, so in this problem were given force and mass in time. We want adult of you so full the friction saw it will opposed will be in the opposite direction. To the direction of motion will be a negative negative. 25 Newton's That's equal to Mass, which is 65 kilograms times Delta V, which we don't know over Delta T, which is 15 seconds. Therefore, Delta V is just 25 times 15 over 65. This will be in meters per second and we get, um, are negative 25 times now and we get minus 5.8 meters per second. Therefore velocity was 5.8 meters per second. Was a velocity lost

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Top Physics 101 Mechanics Educators
Elyse Gonzalez

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Marshall Styczinski

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Lectures

Video Thumbnail

04:05

Conservative and Nonconservative Forces - Overview

In physics, a conservative force is a force that is path-independent, meaning that the total work done along any path in the field is the same. In other words, the work is independent of the path taken. The only force considered in classical physics to be conservative is gravitation.

Video Thumbnail

03:47

Kinetic Energy - Overview

In physics, the kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest. The kinetic energy of a rotating object is the sum of the kinetic energies of the object's parts.

Join Course
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