If H is the height jumped and V is the initial velocity (vertical), conservation of energy tells you that
M g H = (1/2) M V^2
Mass (M) cancels, giving you
H = V^2/(2g)
g = 32.2 ft/s^2, so
H = 25/(64.4) = 0.388 ft = 4.66 inches
Your stated answer of 65/64 should be 25/64 ft. They are expecting you to use 32 ft/s^2 for g, which is not quite right.
A typical flea jumps vertically w/an initial velocity of about 5ft/s. How much does the flea jump?
Ans. 65/64ft or 4.7in.. pls show the solution and explain.. thanks a lot.. :)
1 answer
1 answer