An object of mass 2 kg is fired vertically upwards with a K.E. of 100 J. Neglecting air resistance, which of the numbers in A to E below is a) the velocity in m/s with which it is fired AND b) the height in m to which it will rise?
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Answer:
what is problem here?
Explanation:
use kinetic energy formula and solve the equation u will get velocity.
KE=1/2mv^2.
for height u can use formula
V^2=U^2+2aS
where V is final velocity 0.U is inital velocity which u find above . and a is acceleration =10 m/s. amd S is height.
SO after solving this equation u will get S.
IF STILL HAVE PROBLEM COMMENT ME.
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