<span>The correct answer is b. An earthquake occurs. Basically, the earth's crust can't deal with the stress and strain so an earthquake occurs. That's why earthquakes are common where tectonic plates are unstable like the pacific area and the Western part of US. Places like Japan and San Francisco are famous for having earthquakes.</span>
Answer:
7.5 N/m
Explanation:
Potential energy of a spring can be calculated using below formula
Potential energy= 1/2kx^2
potential energy = 60 J
X= displacement = 4 m
K= spring constant=?
Substitute the values we have
60= 1/2 × K × 4^2
60= 1/2 × K × 16
60= K × 8
K= 7.5 N/m
Hence, the spring constant of the spring is 7.5 N/m
Power = change in work/change in time
P = 600 joules/ 4 seconds
P= 150 watts
hope this helps :)
Answer:
c. The forces acting on the box are balanced.