**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

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

...

**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

**v**^2 -**u**^2 = 2a***s v**= 150,**u**= 0,**s**= 0.5m so a = 150^2 / (2*0.5) = 22500 m/**s**^21 Answers · Science & Mathematics · 06/04/2013

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

...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

... 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

...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

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

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 Luck1 Answers · Science & Mathematics · 02/03/2013