hi ,
we all know that the force is the rate of change in momentum and this happens if there is some velocity gradiend ,
but if we have a car with a uniform straight velocity and this car hits a wall , how can i calculate the force excerting by the car on the wall ?
note that : there is no momentum change as the speed is uniform,
please help !!!!
2007-02-01 15:30:37 · 4 answers · asked by smash 2 in Science & Mathematics ➔ Engineering
f=m dv/dt
m=weight of car
dv/dt = (the velocity the car is going before it hit the wall - velocity the car is going after it hit the wall-which i assume is stopped) / the time it takes for the car to stop. = mass *acceleration
note velocity is uniform until it hits the wall. than it accelerates from what ever velocity to stopped in a very short time. It is then the force is created.
2007-02-01 15:40:13 · answer #1 · answered by BRUZER 4 · 0⤊ 0⤋
Acceleration is speed going from uniform to 0, with time being some value so that it is not instantaneous. a = V/t
P = mV
F = ma
a = V/t
F = P/t
F = mV/t
F = m * V/t
2007-02-01 15:52:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋
theory is a theory contained in this variety of electro-chemical reactions which supply the fact seeker the sensation of existence and certainty. HAHAHAHAHAHAHA!!! in basic terms a theory............ :)
2016-11-02 02:42:46 · answer #3 · answered by Anonymous · 0⤊ 0⤋
This is an impluse problem. Study up on it.
2007-02-02 10:31:10 · answer #4 · answered by daedgewood 4 · 0⤊ 0⤋