A swimmer bounces straight up from a diving board and falls feet first into a po

Question

A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, and her takeoff point is 1.90 m above the pool.
(a) How long are her feet in the air? ________s (b) What is her highest point above the board? ________m (c) What is her velocity when her feet hit the water? _________m/s A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, and her takeoff point is 1.90 m above the pool.
(a) How long are her feet in the air? ________s (b) What is her highest point above the board? ________m (c) What is her velocity when her feet hit the water? _________m/s A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, and her takeoff point is 1.90 m above the pool.
(a) How long are her feet in the air? ________s (b) What is her highest point above the board? ________m (c) What is her velocity when her feet hit the water? _________m/s

Explanation / Answer

velocity v=4 m/s

distance s=1.90 m

(a) ans

the time t=distance/velocity=1.90/4=0.475 sec

(b) ans

the height point above the board

H=1/2gt^2=1/2*9.8*(0.475)^2=1.11 m

(c) ans

the velocity when her feet hit the water

V=s/t=1.11/0.475=2.34 m/s

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