Select the correct answer. A bus is traveling with a uniform acceleration of 2.75 meters/second2. If the initial velocity of the
2 answers:
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Answer:
The value of radiation pressure is Pa
Explanation:
Given:
Intensity
Area of piece
From the formula of radiation pressure in terms of intensity,
Where radiation pressure,
speed of light
We know value of speed of light,
Put all values in above equation,
Pa
Therefore, the value of radiation pressure is Pa
Answer:
1) 2.467 N
2) a) 0.248m
b) 2.3π rad/sec
Explanation:
Given data:
mass of Banana bunch ( m ) = 2.0 kg
radius of circular path ( R ) = 0.5 m
number of revolutions completed = 2
Time to complete 2 revolutions = 6 seconds
1) Determine the force to keep the motion constant for one complete revolution in every 4 seconds
F = mv^2 / r ----- ( 1 )
where V = 2πR/T
where : R = 0.5 , m = 2, T = 4 seconds
Insert values into equation 1
F = 2 * 4π^2 * 0.5/4^2
= 2.467 N
2a) Calculate the maximum distance of coin from center
angular velocity ( w ) = v/r
coefficient of static friction ( μ ) = 0.25
---- ( 1 )
mv^2/r = μmg --- ( 2 ) cancelling the mass on both sides eqn 2 becomes
v^2 = μ*g*r
dividing both sides of equation by r^2
w^2 = μ*g/r
hence determine distance ( r ) of coin from center
r = 0.25 * 9.81 / π^2 = 0.248 m
2b ) determine the maximum speed of rotation of the turntable for the coin to move relative to the turntable without slipping
distance coin is placed ( r ) = 4.7 cm = 0.047 m
find speed of rotation ( w )
w^2 = μ*g/r
w = √ 0.25 * 9.81/ 0.047
= 7.2236 rad/secs ≈ 2.3π rad/sec