Asked by chancy
A ball of mass 400g is thrown with an initial velocity of 30.0 ms-1 at an angle of 45.0 degrees to the horizontal.air resistance is negligible.the ball reaches a maximum height H after a time of 2.16s (1)calculate the initail kinetic energy of the ball? (2) the maximum height H of the ball?
Answers
Answered by
chancy
Physics sorry
Answered by
MathMate
Use
sum of potential and kinetic energies = constant
when air resistance is neglibible.
Potential energy = mgh at a height h from datum
kinetic energy = (1/2)mv^2 when moving at a speed of v.
sum of potential and kinetic energies = constant
when air resistance is neglibible.
Potential energy = mgh at a height h from datum
kinetic energy = (1/2)mv^2 when moving at a speed of v.
Answered by
chime
Maximum height is 45.918m and the initial kinetic energy is 180J
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