Answer:
The wheel has turned θ= 4.84 rad when its angular speed is ωf= 2.1 rad/s
Explanation:
ωi= 3.4 rad/s
ωf= 2.1 rad/s
α= - 0.736 rad/s²
ωf= ωi - α*t
(ωf-ωi)/α=t
t= 1.76 s
θ= ωi * t - α * t²/2
θ= 4.84 rad
The total energy remains the same, as long as
none of it escapes the closed system.
We calculate current from the formula:
, where q is a electric charge transferred over time t
Time should be converted to seconds:
1h 15 min= 75min= 4500s
I=
Result is in unit-Ampere
Answer:
Physics is a brand of science that deals with nature, matter, and energy. Physics is used in the everyday world because we have simple objects such as levers that use physics. we also have Newton's law of transportation that manipulate everyday objects making them move, so without physics many objects wouldn't move.