Basic Physics question, find average acceleration and velocity?

[ADH]

Branden runs for a ball from a dead stop. It takes him 3 sec to reach it after traveling 10 meters.

What was his average acceleration?

What velocity did he achieve when he caught the ball?

Thank you!

 

[rock.freak667]

Branden runs for a ball from a dead stop. It takes him 3 sec to reach it after traveling 10 meters.

What was his average acceleration?

What velocity did he achieve when he caught the ball?

Thank you!

Please post your work.

(Hint: Recall your kinematic equations of motion)

 

[ADH]

My attempt was this. I found the velocity, I think.

For velocity I have 3.333 meters/second.

I was not sure how to find acceleration, or what formula to use.

My teacher gave us this formula: velocity = velocity(sub zero) + at . So should I make a permuatation out of this formula to give me: a = (velocity - velocity(sub zero)) / t ?

So then a = 3.333m/s - (initial velocity) / time

I'm pretty confused. Thanks for helping.

 

[rock.freak667]

My attempt was this. I found the velocity, I think.

For velocity I have 3.333 meters/second.

I was not sure how to find acceleration, or what formula to use.

My teacher gave us this formula: velocity = velocity(sub zero) + at . So should I make a permuatation out of this formula to give me: a = (velocity - velocity(sub zero)) / t ?

So then a = 3.333m/s - (initial velocity) / time

I'm pretty confused. Thanks for helping.

You have these formulas

x=v₀t+0.5at²

v=v₀+at

v²=v₀²-2ax

Which equation has acceleration, time and distance in it?

 

[OThePestO]

Try organizing your data, see what you have and what is missing/required.

For example:

Vinitial=0 m/s t=3s d=10m a=? Vfinal=?

These formulas should help.

d= 1/2 (Vi+Vf)t

Vf= Vi + at

d=Vi(t) + 1/2 a(t^2)

G'luck!