A cannon launches a cannonball at an initial speed of 70.0 m/s, at an angle of...
A cannon launches a cannonball at an initial speed of 70.0 m/s, at an angle of 55° up from the horizontal. The ball strikes a castle wall 8.0 s later. How fast is the ball going when it strikes the wall?(ANSWER GIVEN:45 m/s)
Homework Answers
vertical velocity after 8 s
vy = 70 sin 55 - 9.8* 8 = - 21.06 m/s
horizontal velocity
vx = 70 cos 55 = 40.15 m/s
net velocity at that instant
v^2 = vx^2 + Vy^2
v = 45.338 m/s
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