A ball is thrown up onto a roof, landing 4 sec later at height of 20m above the release level. The balls path just before landin
g is angled at 60 degree with the roof.
a) find the horizontal distance d it travels.
b) what is the magnitude of the balls initial velocity?
c) what is the angle (relative to the horizontal) of the balls initial velocity?
1 answer:
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The car's speed is 240km/4hr= 60km/hr.
There's not enough information given in the question to determine its velocity.
<span>(a) E = ½ Q²/C, so ..
(b) E(max) = ½Li² (i=current), so .</span>
If you go to high you’ll run out of oxygen and possibly be blown off due to high winds.
Assuming it is on a horizontal surface:
friction = μR
R = 20g (g is gravity 9.81)
so Friction = 0.085 x 20g
Work done is force x distance
so Work done = 0.085 x 20g x 28
= 466.956 J
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it is because they can store and retrieve informatiion just like human beings
