How Do You Calculate Work and Distance in These Physics Problems?

In summary, there is a car that changes its velocity from 25m/s to 8.0m/s and has an average braking force of 16000N. We need to find out how far the car will go in this time, given that it has a mass of 2300kg. In another scenario, a 75kg runner increases their speed from 1.2 m/s to 4.0m/s in 1.7s. We also need to calculate the work done in this situation and determine how much additional work is done due to a frictional force of 26N acting against the runner.
  • #1
moela
6
0
1. A car changes velocity from 25m/s to 8.0m/s. If the average force applied to the brakes is 16000N, how far does the 2300kg car go in this time?

2. How much work is done if a 75kg runner speeds up from 1.2 m/s to 4.0m/s in 1.7s? How much extra work is done if there is a force of friction against the runner of 26N?
 
Physics news on Phys.org
  • #2
Hey, moela, welcome aboard!

You need to show work before we can help.
 
  • #3
You can start off by calculating what you can.
For example if you know the mass and the speed what can you find out?
 

FAQ: How Do You Calculate Work and Distance in These Physics Problems?

What is work energy?

Work energy is a concept in physics that describes the transfer of energy from one object to another when a force acts on the object and causes it to move in the direction of the force.

How is work energy calculated?

Work energy can be calculated by multiplying the force applied on an object by the distance the object moves in the direction of the force. This is known as the work-energy theorem: W = F*d.

What is the difference between work and energy?

Work and energy are related concepts, but they are not the same. Work is the transfer of energy from one object to another, while energy is the ability to do work. In other words, work is the result of energy being transferred.

How is work energy related to everyday life?

Work energy is present in many everyday activities, such as lifting objects, riding a bike, or even walking. In all of these actions, energy is being transferred from our muscles to the objects we are interacting with, resulting in work being done.

What are some real-life applications of work energy?

Work energy is used in various fields, including engineering, sports, and transportation. Some examples of real-life applications of work energy include using a pulley system to lift heavy objects, calculating the force needed to push a car up a hill, and measuring the energy output of an athlete during a workout.

Similar threads

Work & Energy (Question on Classical Mechanics/Slope based Problems)
Replies
7
Views
1K
Avg Power in a Rotational Energy/Work Problem
Replies
6
Views
759
The Work of Friction: Explained in .32m
Replies
8
Views
1K
Lifting an object, kinetic energy, work and forces
Replies
11
Views
5K
Finding the work done by a block
Replies
4
Views
2K
Integral for work done leading to potential energy sign confusion
Replies
5
Views
1K
Kinetic energy & Conservation of energy
Replies
17
Views
1K
Solving Newton's Second Law: Tension, Work and Kinetic Energy
Replies
10
Views
1K
Simple Work Problem Disagreeing with Kinematics
Replies
4
Views
1K
What is considered the "System" here? (conservation of energy problem)
Replies
20
Views
2K

Hot Threads

Recent Insights

Back
Top