a baseball is hit so that it travels straight upward after being struck by the bat. a fan observes that it takes 3.00 seconds to reach it's maximum height. find (A) the ball initial velocity and (B) the height it reaches.
1
Expert's answer
2013-03-14T10:31:55-0400
a baseball is hit so that it travels straight upward after beingstruck by the bat. a fan observes that it takes 3.00 seconds to reach it's maximum height. find
(A) the ball initialvelocity The ball falls freelly,therefore: v = v0 - g*t v0 - the ball initialvelocity g - gravitationalacceleration t - time When v = 0, t = 3.00sec: 0 = v0 - g*t => v0 = g*t v0 = 9.8*3m/s= 29.4 m/s Answer: v0 = 29.4 m/s
(B) the height itreaches. The law conservation ofenergy: m*g*h + 0= m*v0^2/2 + 0 h - maximum height h = v0^2/(2g) = | v0 = g*t | = gt^2/2 = 44.1 m Answer: h = 44.1 m
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
APPROVED BY CLIENTS
"assignmentexpert.com" is professional group of people in Math subjects! They did assignments in very high level of mathematical modelling in the best quality. Thanks a lot
Comments
Leave a comment