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1. ### Physics Problem?

s = distance (100m) u = initial speed (0) v = final speed t = time g = acceleration (9.81 m/ s ^2 due to gravity) s = ut + gt^2 / 2 100 = 0 + 9.81t^2 / 2 t = sqrt(2 * 100 / 9.81) = 4.52 s . v ^2 = u ^2 + 2gs v ^2 = 0 + 2 * 9.81 * 100 v = sqrt(2 * 9.81 * 100) = 44.3 m/ s .

1 Answers · Science & Mathematics · 05/05/2008

2. ### Determing speed, force and time from momentum?

Part a) 0.4m = s = target length u = 1200m/ s v = 800m/ s v ^2 = u ^2 + (2*a* s ) rearranging...for a to give a=F/m a = 20000/250 = 80m/ s ^2 Again v = u + a*t u = 0, a = 80, t = 0.0004 so velocity of...

1 Answers · Science & Mathematics · 24/11/2009

3. ### A baseball is thrown vertically upward with a speed as it leaves the hand of 30 m/ s ?

... V ^2= u ^2+2as 0 = 30^2 +2* (-9.81) * s s = 45.9m (c) t*2 3.05*2 =6.1 s (d) V = u +at 20= 30= (-9.81)*t t = 1.01s methods are correct,,but...

4 Answers · Science & Mathematics · 13/02/2013

4. ### Physics Question, help please!!?

v ^2 - u ^2 = 2a* s v = 150, u = 0, s = 0.5m so a = 150^2 / (2*0.5) = 22500 m/ s ^2

1 Answers · Science & Mathematics · 06/04/2013

5. ### Physics Help 10 points?

Here, u =5m/ s ,g=9.8m/ s ,h=6m. 1.We know, v ^2= u ^2+2gh=142.6 or, v =11.94m/ s . 2.Again,h=[( u + v )/2]*t or,t=2h/( u + v )=0.7084sec. So time=0.71sec. That' s it!!!

3 Answers · Science & Mathematics · 19/12/2013

6. ### Hard physics question ! help!?

...h1= v ^2/2g=5.1 m v =0 v = u +at v = u -gt [a=-g] t1=1.02 s for downward journey u =0 v =20 m/ s KE=PE 0.5mv^2=mgh h2= v ^2/2g=20.41 m v = u +at v = u +gt [a=g...

1 Answers · Science & Mathematics · 12/07/2013

7. ### What is the strength of the magnetic field?

... u ΔL sin θ cos ϕ ] … where … Δ V = 0.050 V … … u = 8.0 m / s … θ = angle between u and B … … ϕ = angle between axis of wire and plane...

2 Answers · Science & Mathematics · 14/03/2012

8. ### Easy grade 11 physics?

...and the distance is the average velocity times time, that is to say s = t( u + v )/2 We remember from above that ( v - u )/t = a we defined that ...

6 Answers · Science & Mathematics · 12/03/2012

9. ### You throw a ball straight into the air at 18m/ s from 32m above the ground. How long does it take for the ball to hit the ground?

At impact, the velocity is -18 m/ s , so v = u + at gives -18 m/ s = 18m/ s - 9.8m/s² * t t = 3.7 seconds

1 Answers · Science & Mathematics · 24/09/2020

10. ### Physics question help :3?

Hello, Initial velocity ( u ) is zero. Final velocity ( v ) is -32 m/ s Acceleration (a) = -6.9 m/ s ^2 v = u + at t = ( v - u )/a t = (-32 m/ s + 0 m/ s ) / -6.9 m/ s ^2 t = 4.64 sec Good Luck

1 Answers · Science & Mathematics · 02/03/2013