Compounds are elements that are chemically combined, like water for example (it’s both hydrogen and oxygen.)
The amplitude was doubled
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Answer:
Q = 735 J
Explanation:
In this exercise we must assume that all the mechanical energy of the system transforms into cemite energy.
Initial energy
Em₀ = U = m g h
final energy
= Q
Em₀ = Em_{f}
m g h = Q
let's calculate
Q = 30 9.8 2.5
Q = 735 J
Answer:
Magnitude of the resultant = 357.85 N
Direction of the resultant is 12.1° from the 220 N force and still in between the two forces 150 N and 220 N
Explanation:
Let the direction in which the 220 N force is acting be the x-axis, then the 150 N force is acting 30° from the 220 N force, i.e. the x-axis.
The 220 N force in vector form = (220cos 0°)î + (220sin 0°)j = (220î) N
The 150 N force in vector form = (150cos 30°)î + (150sin 30°)j = (129.9î + 75j) N
The resultant is the vector sum of both forces = (220î) + (129.9î + 75j) = (349.9î + 75j)
Magnitude = √(349.9² + 75²) = 357.85 N
Direction = tan⁻¹ (75/349.9) = 12.1° From the 220 N force (x-axis)
