Electric Car Help: Calculating Horsepower Needed

Click For Summary

Homework Help Overview

The discussion revolves around calculating the horsepower needed for an electric vehicle, given its mass, battery specifications, speed, and friction force. The context involves concepts from physics related to power, force, and energy efficiency in electric vehicles.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the relationship between force, velocity, and power, with one suggesting a formula involving these variables. There is also a prompt for the original poster to clarify which information is essential for solving the problem.

Discussion Status

The discussion is ongoing, with participants exploring different aspects of the problem. Some guidance has been offered regarding the necessity of certain information, and there is acknowledgment of the initial approach to the problem.

Contextual Notes

There is an emphasis on identifying relevant versus irrelevant information provided in the problem statement. The assumption of 100% efficiency and neglecting energy used for acceleration are also noted as constraints in the discussion.

gamer6218
Messages
2
Reaction score
0
electric car help :)

A projected electric vehicle makes use of storage batteries as its source of energy. Its mass is 1560 kg and it is powered by 24 batteries, each 12 V, 95 A hr. Assume that the car is driven on level roads at an average speed of 32.4 km/hr and the average friction force is 240 N. Assume 100% efficiency and neglect energy used for acceleration. No energy is consumed when the vehicle is stopped, since the engine doesn’t need to idle. Determine the horsepower required.
 
Physics news on Phys.org
You need to show what sorts of concepts you would use to solve this problem and an attempt at a solution before we can help. I will tell you that you don't need all of the information you are given. Which info is necessary and which isn't?
 
A simple force*velocity = power, converted into horsepower seems to work. seems I posted prematurely. Sorry for that :(
 
Right you are.
 

Similar threads

Electric car and battery problem
  • · Replies 12 ·
Replies
12
Views
2K
How Do You Calculate Race Car Acceleration and Power Output?
  • · Replies 20 ·
Replies
20
Views
2K
Calculating Efficiency of Electric Vehicle
  • · Replies 6 ·
Replies
6
Views
3K
Efficiency of charging new and old Li-ion batteries in electric cars
  • · Replies 10 ·
Replies
10
Views
4K
Electric cars: What do you think?
  • · Replies 117 ·
4
Replies
117
Views
11K
Energy density and range calculation Electric Vehicle
  • · Replies 18 ·
Replies
18
Views
9K
Car acceleration kinematics give average power
  • · Replies 5 ·
Replies
5
Views
2K
High School Is a Battery-Electric Vehicle Really More Efficient Than a Gas Car?
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Why Isn't Horsepower an SI Unit, Despite Its Popularity?
  • · Replies 29 ·
Replies
29
Views
4K
Calculating the Stopping distance
  • · Replies 7 ·
Replies
7
Views
3K