Convert 580 g to kg.
2 answers:
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Answer:
The same amount of energy is required to either stretch or compress the spring.
Explanation:
The amount of energy required to stretch or compress a spring is equal to the elastic potential energy stored by the spring:
where
k is the spring constant
is the stretch/compression of the spring
In the first case, the spring is stretched from x=0 to x=d, so
and the amount of energy required is
In the second case, the spring is compressed from x=0 to x=-d, so
and the amount of energy required is
so we see that the amount of energy required is the same.
Time taken to reach water :
Now, initial vertical speed , u = 0 m/s.
By equation of motion :
Here, a = g = acceleration due to gravity = 9.8 m/s².
So,
Therefore, the height of the bridge is 3.46 m.
Hence, this is the required solution.
Answer:
Explanation:
The electric field that will balance the weight of the oil drop can be calculated using the following:
electric force, F = e E ( where, e is the charge of an electron and E is the electric field)
weight, W = 2.5 ×10⁻¹⁴ N
e E = W
Substitute the values: