Egg cell , sperm cell , embryo
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.
A snowball picks up speed as it rolls down the mountain.<em> (D)</em>
Since the description includes acceleration ("picks up speed"), we know that the forces on the snowball must be unbalanced.
The answers is it Must be tested