# Homework Help: Estimates on accelerations for different objects

1. Feb 20, 2015

### samrox126

1. The problem statement, all variables and given/known data

Write a “short” entry (at least 5 to 6 sentences) that shows estimates of the accelerations of different objects including a sports car (please specify make and model), a tennis ball serve and an electron in an electric field. Compare and Contrast the accelerations of these objects.

2. Relevant equations
force F=qE.
a=qE/m.

3. The attempt at a solution
Electron goes faster than a sports car and a tennis ball serve. A sports car goes 97 km/hr in 3.5 seconds.
I just don't know how to expand my answer in terms of comparing the accelerations of these objects.

Last edited: Feb 20, 2015
2. Feb 20, 2015

### Jediknight

did you have a question? (I probably can't help cause I'm not to the point where I've been taught F=qE but I feel like you should specify where your having difficulty, from what u wrote it seems like your getting it)

3. Feb 20, 2015

### samrox126

I just don't know how to expand my answer in terms of comparing the accelerations of these objects.

4. Feb 20, 2015

### Jediknight

for an essay q huh, just throw in every step of your quantitive analysis (right down to a=Δv/Δt), the put in in terms of order of magnitude, and maybe for show throw in some similar velocity realationships people can visualize (such as an electron acc./car acc. is proportional to a jet plane and a turtle, or something)

you get the physics of it, now you just want to make it sound good, think of how these comparisons would have made sense to you before you took a physics coiurse

personally I feel its a subjective lame question better suited for an education class, but if you gotta go throw the motions to get the good old essay format out of it going through the motion shouldn't be that hard

5. Feb 20, 2015