Batter Helmet
Sep/090
Physics question?
The third bowl was a bouncer. The ball struck the batter on the helmet, bounced vertically up into the air at a speed of 19ms-1 before falling back to the ground. Show that the ball travelled a height 18m above the helmet.
We can use the kinematic equation:
2gdy = Vf^2 - Vi^2, where dy = vertical height reach, Vf = final velocity at maximum height, Vi = initial vertical velocity.
Consider up as positive and down as negative.
2(-9.8)dy = 0^ - 19^2
dy = -19^2/[(2)(-9.8)]
dy = 18.4 approx. 18 m ANSWER
Hope this helps.
teddy boy
Pokemon Red & blue - Evolution (music)
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