Question
A bullet is fired from the top of a cliff with a velocity of 150m/s at Anna angle of elevation 30°to the horizontal .find the horizontal distance from the foot of cliff to the point where the bullet lands on the ground
Answers
Anonymous
Need the height of the cliff.
vertical problem
Vi = 150 sin 30 = 75
v = 75 - 9.81 t
h = cliff height + 75 t - 4.9 t^2
find t when h = 0
then Horizontal problem, constant speed u = 150 cos 30
distance horizontal = u t
vertical problem
Vi = 150 sin 30 = 75
v = 75 - 9.81 t
h = cliff height + 75 t - 4.9 t^2
find t when h = 0
then Horizontal problem, constant speed u = 150 cos 30
distance horizontal = u t