a ball which is thrown Vertically up words reaches the roof of a house 100 m high.at the moment this ball is thrown vertically up ward ,another ball is dropped from rest vertically downwards from the roof of the house.at which time, height the ball will pass each other.
1
Expert's answer
2012-09-27T10:51:59-0400
H = V0 * t - g * t^2 / 2 V0 = g * t, so t = V0 / g: H = V0^2 / g - g * V0^2 / (2 * g^2) = V0^2 / (2 * g) V0 = sqrt(2 * g * H) V0 = sqrt(2 * 9.81 * 100) = 44.30 m/s
For the first ball: Hx = V0 * tx - g * tx^2 / 2: For the second one: Hx = H - g * tx^2 / 2 V0 * tx - g * tx^2 / 2 = H - g * tx^2 / 2 V0 * tx = H tx = H / V0 tx = 100 / 44.30 = 2.26 s And the height will be: Hx = H - g * tx^2 / 2, Hx = 100 - 9.81 * 2.26^2 / 2 = 74.95 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