Using the equation of motion:
h = ut - 0.5gt²,
g is -ve for a rising body, g ≈ 10 m/s², t = 4s, u = 39.2m/s
Note that in this problem we are neglecting the height of the student.
h = ut - 0.5gt²,
h = 39.2*4<span> - 0.5*10*4² Use a calculator
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h = 76.8 m
The building is 76.8 m tall.
Answer:
Gravity,momentum & friction are examples of FORCE.
Explanation:
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The output of the machine is
(output work) = (output force) x (distance)
450 N-m = (output force) x (3 meters)
Divide each side
by 3 meters: Output force = (450 N-m) / (3 m)
= 150 newtons .
With all the information given about the output work, we don't need
to know anything about the input work, or even the fact that we're
dealing with a machine.
It's comforting, though, to look back and notice that the output work
(450 N-m) is not more than the input work (500 N-m). So everything
is nice and hunky-dory.
___________________________________
Well, my goodness !
I didn't even need to go through all of that.
Given:
-- The input force to the machine is 50 newtons.
-- The mechanical advantage of the machine is 3 .
That right there tells us that
-- The output force of the machine is 150 newtons.
We don't need any of the other given information.
A gas heated to millions of degrees would emit mostly x-rays.
Answer:
second class lever
Explanation:
because in bottle opener the load lies between effort and fulcrum
thus answer may help u
