Answer:
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Answer:
The two planetary movements are revolution and rotation.
Explanation:
In the vast solar system, planets traverse while also remaining fixated within the system because of gravity. Each planet is unique and so is its movement, but, at the same time, there are two common types of movements.
Echo means repetition of sound..If someone is speaking there will be two sounds..one which he is speaking right now and the other sound which he/she spoke earlier ..this will lead to confusion..in big halls the distance would be more than 17 m between the walls which will cause echo and not reverberation(prolongation of sound)
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Answer:
(a) E = 73.5mJ
(b) v = 2.188 m/s
(c) KE = 55.1 mJ
(d) PE = 18.37mJ
Explanation:
m = mass of the object = 0.03 kg
k = spring constant = 30 N/m
A = amplitude = 0.07 m
For part (a)
The total energy of the system can be found by:
E = k × A² / 2
E = (30 N/m) × (0.07 m)² / 2
E = 0.0735 J
E = 73.5mJ
For part (b)
The elastic potential energy in the spring at position d = 0.0105 m is:
PE = k × d² / 2
PE = (30 N/m) × (0.0105 m)² / 2
PE = 0.00165375 J
The kinetic energy at that point is:
KE = E - PE
KE = (0.0735 - 0.00165375)
KE = 0.07184 J
So its speed is:
KE = m × v² / 2
v = √( 2 × KE / m )
v = √( 2 × (0.07184 J) / (0.03 kg) )
v = 2.188 m/s
For part (d)
The elastic potential energy in the spring at position d = 0.035 m is:
PE = k × d² / 2
PE = (30 N/m) × (0.035 m)² / 2
PE = 0.018375 J
PE = 18.37mJ
For part(c)
The kinetic energy at that point is:
KE = E - PE
KE = (0.0735J) - (0.018375 J)
KE = 0.0551 J
KE = 55.1 mJ