# Yahoo Web Search

1. ### For positive constants k and g, the velocity, v , of a particle of mass m at time t is given by?

a = dv/dt = mg/ k *(- k / m )*e^(kt/ m ) = -g*e^(kt/ m ) at t = 0 the rate of change a = -g = -9.8m/s^2 at t = 2 then a = -g*e^(2k/ m ) This means that the velocity is reducing since the value of a is negative

1 Answers · Science & Mathematics · 24/03/2010

2. ### Particle Dynamics question?

Newton's 2nd law m g - m k v = m a If v is constant, a = 0 , then v = g/ k

2 Answers · Science & Mathematics · 16/10/2009

3. ### Whats yor fave girl names that start with each letter?

A - audrina B- brooklyn C- candace ...gretchen H- heidi I- ? J- jayde K - kristyn L- lauren M - mandy N- naomi O- ocean P...- seraphina T- tessa U- ? V - vania W- westerly X- ? Y...

28 Answers · Pregnancy & Parenting · 11/06/2010

4. ### anybody has an idea about how to integrate this?

If v is just a function of t and the other varibles are all ... something in the form of ∫ a tanh(bt) dt, where a = √(gm/ k ) and b=(kg/ m ). In this case you'd have: ∫ a tanh(bt) dt = a ∫ tanh...

4 Answers · Science & Mathematics · 30/06/2007

5. ### Whats your favorite band? ( A -Z)?

...iron maiden J-judas priest K -kreator L-led zeppelin M -mudhoney N-nirvana ...-the u-men V -van halen W-white zombie X-x (yes it's a real band) Y-ywinge malmsteen...

29 Answers · Entertainment & Music · 27/06/2009

6. ### Using Inference Rules?

...3 --> ~ A v ~W ; distribute ~ over ^ Assume ~ A ~ A --> K ; premise #2 --> M v K ; since K is true we know M v K is true...

1 Answers · Science & Mathematics · 21/12/2010

7. ### Linear Algebra Quesion?

k = [1/3][ v -w] & j = [1/3] [ v + 2w]

1 Answers · Science & Mathematics · 19/11/2009

8. ### a block of mass .250 kg is placed on top of a light, vertical spring of force constant 5000 N/ m and pushed dow?

.../ m )t) Perform the differentiation twice to obtain the acceleration... v = - A √( K / m )sin(√( K / m )t) a = -AK/ m * cos(√( K / m )t) If the block...

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

9. ### PHYSICS HELP! Which equations below is dimensionally correct?

...correct. Since ' k ' is in reciprocal... in meters ( m ), the resultant dimensional ...where # indicates a unitless number... not additive with those of v , which are ( m /s).

1 Answers · Science & Mathematics · 26/08/2013

10. ### What should be the spring constant k of a spring designed to bring a horizontally moving car of mass 967 kg to rest from a speed of 22.7 m /s?

1/2 k Δx ^2 = 1/2 m v ^2 k Δx < = m a then 1/2 k ( m a / k )^2 >= 1/2 m v ^2 m a ^2 / k >= v ^2 k <= m ( a / v )^2 k <= 967 (5.6*9.8 / 22.7)^2 = 5652 N/ m

2 Answers · Science & Mathematics · 22/09/2016