Recent content by -Physician

As I see, you didn't read all the post bro, the high=force acted *time/mass was wrong, next time read all the post... s=ut+at^2/2, it's v_0t not ut , or vt - at^2/2

So my formula is wrong?

Homework Statement I took a ball of mass= 530g and someone held it in a high for me, i wanted to find that high and what i did is : 1. act a force of 7N on it 2. the time of ball going down was 3s i wanted to find the high and what i did is: ##high=force acted * time / mass## when i...

thanks!

Ehm, maybe that would be: ##a=F/m## ##a=5N/1kg=5m/s^2## ##a=\frac{Δ v}{Δ t}## ##5m/s^2=\frac{v_1-0}{t}## I have no v_1(which i have to find) and I have no time.. If so, would that be ##v^2=v_0^2+2ax## which gives us ##v^2=0m^2/s^2+2(5m/s^2)(4m)## ##v^2=40m^2/s^2##...

Homework Statement We have a body with mass=1kg and it's on rest. When a force of 5N acts on it , the body displaces 4m. Assume no friction Find: a)The work that force did b)Velocity at the end of the distance(displace) a) ##Work=Force * Displacement = 5N*4m = 20J## ##A=Fd=(5N)(4m)=20J##...

Homework Statement What force is it needed to move a body from rest at velocity of 5m/s on distance 15m, for time of 2s. Assume no friction.Homework Equations ##F_{net}=ma##The Attempt at a Solution Can I solve this problem without the mass of the body, if yes, what formula is needed? thanks...

By that I understand that none answered my question, what is b , just simply and what is it equal to?

What's that b's unit, and what is it equal to?

If that would be mass divided by time , then we would have ##f=\frac{mv}{t}##, but that's the force formula, even friction is a kind of force, would that be friction's formula as well?

In this case ##F_N=mg## m = mass, g=gravity, gravity pulls down with 9.81m/s^2 so find normal force ##F_N=6kg*9.81\frac{m}{s^2}=58.86N## If you're trying to move the body in constant velocity then ##F_{net}=0## because: ##F_{net}=ma## ##F-F_f=ma## ##F-F_f=m * 0## ##F-F_f=0## so friction is...

In this case that would be ##b=m/t→kg/s * v → m/s = kgm/s^2=N##, so mass times time times velocity gives us air friction but why is that b negative then?

In this formula v is not squared. but if b is coefficient, how would we win Newton for friction coefficient =0.3 (example) v=3m/s ##f_{air}=-bv=(-0.3)(3m/s)## gives us m/s , but not Newton?

Homework Statement In formula of air friction ##f_{air}=-bv## v is velocity but what's b?

F-force a-arm of force b-arm of burden Q-burden