Formula to find the force when the distance,time and mass is given?

Question

Formula to find the force when the distance,time and mass is given?

Answer 1

Use the 3 equations below to work out 3 variables, namely a = acceleration and v = final velocity.

1. v = ut + 1/2at2

2. v2 - u2 = 2as

3. v = u + at

First use 1 and 2 to work out t and u (simultaneous equations)

Then use the other two equations to work out a.

Then F = ma

v = final velocity

u = initial velocity

t = time

s = distance

a = acceleration

F = force

m = mass

Answer 2

Just remember that F=ma and you can't push on a rope.

Everything else in mechanics will fall out with a bit of Calculus and some horse sense.

Doug

Answer 3

Force = (mass)(acceleration)

Distance = .5(acceleration)(time^2) as long as  initial velocity is 0.

so a = 2(d/t^2)

so Force = 2(m * d)/(t^2)

Answer 4

To find F, you need "a"

In motion problems, you need any three of {dist, time, init vel., final vel, accel}

Or, you can use F*t=change in momentum (but you need velocity change here).

You don't have enough info, sorry.  (Unless we are to assume that the initial velocity was zero...in which case...

dist = 1/2 a * t^2 gives you "a" and then F=ma gives you Force)

Please give us the exact problem, if that is not what you were to assume.

-Fred

Answer 5

F=ma

a=(v-u)/t

v&u=d/t

a=(d2-d1)/t

F=ma=m*(d2-d1)/t