Answer:
can you translate in English
Explanation:
maybe if u did I wouldv help u?
Answer: The speed of the edge of the wheel = 19.72m/s
Explanation:
The liner speed of the edge of the wheel is given as;
V=wr
V= linear speed =?
w= angular velocity =456rpm
Converting rpm to rad/s
1rpm = π/30 rad/s
456rpm = 47.75 rad/s
r=0.413m
V=47.75 × 0.413
V= 19.72m/s
Therefore speed of the edge of the wheel = 19.72m/s
Answer:
it would take 3.26 seg for the stone to fall to the water
Explanation:
If we ignore air friction then:
h=h₀ + v₀*t -1/2*g*t²
where
h= coordinates of the stone in the y axis ( height of the stone relative to the surface of the water )
h₀ = initial coordinates of the stone ( height of the cliff relative to the surface of the water = 52 m )
v₀ = initial <u>vertical </u>velocity = 0 ( since the ball is kicked horizontally , has only initial horizontal velocity , and has 0 vertical velocity )
t = time to reach a height h
g = gravity = 9.8 m/s²
since v₀ =0
h= h₀ - 1/2*g*t²
h₀ - h = 1/2*g*t²
t= √[2(h₀ - h)/g]
when the stone hits the ground h=0 ( height=0) , then replacing values
t=√[2(h₀ - h)/g]=√[2(52 m- 0 m )/(9.8m/s²)] = 3.26 seg
t= 3.26 seg
it would take 3.26 seg for the stone to fall to the water
Answer: [B]: The letter, "<em /> I " ; for current; in units of "Amps" .
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