Answer: 808.24625J
Explanation:
Moment of inertia is the physical quantity, that expresses the tendency of a body to resist angular acceleration. It determines the Torque needed for a desired angular acceleration, about a rotational axis
I = 1/2mr²
I = 1/2(W/g)r²
I = 1/2 * 694/9.8 * 1.96²
I = 1/2 * 272.048
I = 136.024kgm²
Also,
Iα = Fr
136.024α = 61.5*1.96
136.024α = 120.54
α = 120.54/136.024
α = 0.8862 rad/s²
Angular Velocity,
ω = αt
ω = 0.8862*3.89
ω = 3.4473 rad/s
K = 1/2Iω²
K = 1/2*136.024*3.4473²
K = 1/2 * 1616.4925
K = 808.24625J
Answer:
0 J
Explanation:
Work is the dot product of force vector and distance vector
According to Newton's 1st law, an object subjected to no force, or net force 0, would maintain a constant speed. If the block is moving with a constant speed, then the net force (gravity, friction) must be 0. Therefore, the work that is done on the block to move at this constant speed must also be 0.
The result of the Sun's light being refracted when it is
high in the sky around noon is blue, indigo and violet are strongly bent that
mostly skim through the upper atmosphere making the sky appear blue. The
refraction of the light during noon makes the sky blue.
Answer:633.8 KJ
Explanation:
Given
mass of water
Initial temperature
Final temperature
Specific heat of water =4190 J/kg-k
heat of vaporization
Heat required for process=heat to raise water temperature from 20 to 100 +Heat to vapourize water completely
Q=mc
Q=
Q=
Q=
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