Answer:
a) 7.848 m/s
b) 3.156 m
Explanation:
t = Time taken
u = Initial velocity = 1.75 m/s
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.81 m/s²
His highest height above the board is 0.156 m
b) Total height he would fall is 3+0.156 = 3.156 m
He is in the air for 0.8+0.18 = 0.98 seconds
a) His velocity when he hits the water is 7.848 m/s
Using conservation of energy law:-
∑ work in = ∑ work out
and work= force* displacement
so when we wanted to move a 100kg a distance of 1m
we multiplied 100*1 = work out
so work in should be equal to 100*g Joules, where g is the acceleration due to gravity.
so workout = 100*g = 25*g *x (divide both sides by 25*g)
x=4m
by the same way:-
------------------------
work in = 100kg * 2m * g (m/
)= work out
so work out = 25*x*g = 200* g (divide both sides by 25*g)
x=8m
Answer:
Answer A is correct
Explanation:
New clouds can form anywhere, so long as there is water vapor in the air.
Wave speed = (wavelength) x (frequency)
= (1.5 m) x (500 / sec)
= 750 m/s .