Looking for t, the computation would be:
t = 2[initial vertical velocity] / g = 2u/g
=> 9 = 2u/9.81
or u = 9 x 9.81 / 2 = 44.16 m/s (upwards)
conservation of energy: loss in potential energy(mgh) would be equal to gain in kinetic energy (½mv²)
=> ½mv² - ½mu² = mg29
=> v² = 58(9.81) + 44.16^2
= 568.98 + 1950.1056 = 2519.0856
getting the square root will give us the speed of the rock, which is:
=> v = √[2519.0856] ~= 50.19 m/s (directed downwards)
Answer: Not 100% sure but I believe the answer is B.
Hope this helps! ^^
Answer:
He will need to exerat a force of 30N
Explanation:
Answer:
Climate is determined by averaging the seasonal weather conditions for a region over a period of many ______ years
Choose the correct association for: dense bushes rain forest or jungle
Choose the correct association for: plains savanna
