Which energy source would you prefer in your neighborhood:
2 answers:
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Answer:
0.001 s
Explanation:
The force applied on an object is equal to the rate of change of momentum of the object:
where
F is the force applied
is the change in momentum
is the time interval
The change in momentum can be written as
where
m is the mass
v is the final velocity
u is the initial velocity
So the original equation can be written as
In this problem:
m = 5 kg is the mass of the fist
u = 9 m/s is the initial velocity
v = 0 is the final velocity
F = -45,000 N is the force applied (negative because its direction is opposite to the motion)
Therefore, we can re-arrange the equation to solve for the time:
We know that d=m/v where d is density, m is mass and v is volume. Lets transform formula to get v in times of d and m
Now we have to substitute our data to formula
V=
ml - its the answeer
Now we have to substitute our data to formula
V=