Answer:
B
Explanation:
t = 2s
u = 0m/s (released from rest)
a = +g = 9.8m/s²
s = H = ?
using,
s = ut + 1/2at²
H = 0(2) + 1/2(9.8)(2²)
H = 0 + 9.8(2)
s = H = 19.6m
5 is the minimum number of cycles necessary for the engine to lift a rock of mass 570 kg
All three are forms of renewable energy.
Wind turbines utilize the wind to generate power, hydroelectric dams also do the same (although most states have stopped using them since they're bad for the environment)
Ethanol, a substitute for gasoline, comes from corn, which can be grown in farms throughout America.
