Recent content by Ilovepysics

1. Homework Statement A block given an intial velocity of 2m/s up a frictionless inclined at 60 degrees to the horizontal. What is the highest point reached by the block? 2. Homework Equations gsin(θ)=a a=v/t d=vit + 1/2at^2 3. The Attempt at a Solution Found vx = vsin60=...

I have drawn a diagram. Thank you, I will look over my calculations

sin -------------------------------------------------------------------------------- 1. The problem statement, all variables and

I am really confused. I am starting to think there is an error in the answer manual. I have tried all motion equations possible. I assumed it reached peak and used vf=3m/s -- that didnt work. I tried vi=3m/-- that didnt work. I tried d= 1/2at^2 that didnt work either. Was my initial attempt at...

TaxOnFear- I tried using vf^2 =vi^2 + 2ad to find vf. I got sqroot of 19 for vf and then plugged it into vf=vi+ at to solve for t I got t=.135 sec... still the wrong answer according to the answer manual.

I also tried using d=vit + 1/2at^2 plugging in 3m/s for vi but I also calculated a wrong answer for t. So I am not sure what equation to use.

grzz what do you mean? Is there another equation I should be using? or perhaps another approach. I am not sure where I went wrong.

Homework Statement A baseball thrown vertically with a speed of 3m/s. Find the total time that the ball has been in flight when it had traveled 50cm. Homework Equations vf=vi + at d= 1/2at^2 The Attempt at a Solution Found t. vf=vi +at vf=3 vi=0 a=~10 Found t= .3 secs...

Penny B travels 605 m . Got it! thanks everyone!

I tried labguys approach by finding the time and such. Should I go about it differently? If so how?

Thanks all! I worked it out using d= vit + 1/2 at^2. -Found time it took penny A to reach hit ground ~15 secs. -Time for penny B is 15 + 5 secs= 20s -Then using d= vit + 1/2 at^2 found how far penny B lands. 2000m. Can someone please verify if this is correct??

Thanks labguy! But how can I find how long it takes penny A to hit the ground if I don't have value for v? Can I use. d= vit + 1/2 at^2 and make vi=0?

@ Sandy.bridge - yes that is all the information given. So assuming air resistance is negligible the first penny has an accceleration of 9.81N/kg?? What about the second penny?>>> If a penny with mass 2.5g is dropped at this point how far does it travel before the first penny hits the ground?

Homework Statement A penny with mass of 3.1 grams is dropped from skyscrapper of height 1250m. Find the objects acceleration after 5 secs. If a penny with mass 2.5g is dropped at this point how far does it travel before the first penny hits the ground? Homework Equations Kinematic...