A motor takes Ts to cover the distance ?

Thread starter manal950
Start date May 28, 2012
Tags

Motor

Click For Summary

To solve the problem of a motor covering a distance, the relevant kinematic formula is S = ut + 1/2at², where S is the distance, u is the initial velocity, a is the acceleration, and t is the time. This equation allows for the calculation of distance under uniform acceleration. By rearranging the formula, two equations can be derived to solve for acceleration and initial velocity. Understanding these equations is crucial for determining the motor's performance over time. Utilizing these kinematic principles will effectively address the question posed.

May 28, 2012

manal950

Hi

what is the idea for solving this question ?

http://store2.up-00.com/May12/28k31950.jpg

Last edited by a moderator: May 6, 2017

Physics news on Phys.org

May 28, 2012

Doc Al

Mentor

What kinematic formula might be relevant?

May 28, 2012

Infinitum

The equations of motion under uniform acceleration. You'll get two equations in 'a' and 'initial velocity', from which you can solve for the other variables.

May 28, 2012

manal950

Ok

then we use this equation

S = ut + 1/2at^2

thanks

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

View full post »