Using conservation of momentum, we can solve for the force that the air bag exerts on the person.
Recall the equation for momentum (p):
We can solve for total momentum, then divide by out time interval. This gets us:
F = 4800N
ΔPE = mgh₂ - mgh₁= mg(h₂- h₁) = mgΔh
Answer:
solution:
when the engine are fired the rocket has a linear constant acceleration motion:
is the final velocity of the rocket
when the engines are fired it become equal to the initial velocity of the rocket,
<em>when the engines are shut off</em>
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solve eq(1) and eq(2) we find
solving for =364.65 m
Where is the distance travelled by the rockets for shutting off the engine
<em>when the engines are fired:</em>
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NOTE:
DIAGRAM IS ATTACHED
Power is defined as rate of work done which means it is work done in 1 second of time
Now it is given that we have a horse that will give power 745.7 W
So it will do work of 745.7 J in 1 second of time
now if we wish to find the work done by horse in 0.55 s
so we can say
So it will do total work of 410.14 J in 0.55 s of time