Recent content by ahmed emad

okay ,but if you see it as a collision and the air molecule mass is constant and its initial velocity is also constant, and the object velocity is also constant but its mass is changing so the reaction force will change , so drag force must depend mass.

if the drag force is the reaction force on the elastic collision between air molecules and the object , so it have to depend on the momentum of the air molecules and object momentum, is that right?

Why drag force doesn't Depend on the mass of the Object?

Okay , thanks very much.

It's far from my question. I meant will the centripetal acceleration increase?

In uniform curved motion , I can get the acceleration from the equation : A = v2/r , but in non uniform the velocity is changing , so will the certipetal acceleration also change ?

No it's just was an addition from me , thank you so much , I understood it.

But is the direction of acceleraion will be the direction of ∆v? And can I use kinimaticts fourmlas with this acceleration?

A=∆v/t so 5✓2 /2 , is that right?

Sorry i forgrot write it , time is 2s

Homework Statement If my car was moving to the right then I changed direction of motion to down, and the speed is constant and =5m\s, how to calculate acceleration Homework Equations Δv=vf-vi The Attempt at a Solution Make vectors addtion and use pythagorean theorem formula, so change in v...

Okay thank you very much

So should I make vectors addtion and use pythagorean theorem formula ?

Okay , but the change in velocity will be zero and acceleration also will be zero , and that's wrong ,because if there is change in direction so it must be acceleration

Ya,but but what if speed not changing only direction