Answer:
(a) 1.28 m
(b) 0.51 s
Explanation:
Given:
Initial speed, U = 5 m/s
Consideration;
1. When the coin is tossed upward, the coin is moving against gravity. Therefor, the acceleration due to gravity experienced by the coin is negative, -g = -9.8 m/s².
2. The final velocity of the coin in the air is zero.
From equation of motion under free fall,
V² = U² + 2gh
h =
Where;
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity
h is the height
h = 1.2755 m
h = 1.28 m
(b) The coin still has its initial velocity, u to be equal to 5 m/s, final velocity, v to be equal to 0 m/s and acceleration due to gravity to be -9.8 m/s while in the air before returning to the release point.
From equation of motion under free fall,
V = U + gt
t = 0.51 s
Earth rotates about this axis once each day (approximately 24 hours)
and revolves around the sun every year ..
Hope this helped ! :)
<span> When a gas is cooled, it contracts. In a sealed environment, the pressure would therefore reduce, as the molecules try to get closer together, that is, push outwards less. But in the atmosphere, the closer-packed molecules (or atoms, of course) make the air more dense, therefore heavier.
If you were at a higher elevation, the cooling is caused by the reduced pressure causing the molecules to move further apart. The temperature reduces about 1 degree Centigrade for every 100metres gain in elevation.
Any good? </span>
Answer:
wA - T =mA(a)
second option
Explanation:
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