Answer:
Explanation:
Given
Amplitude of oscillation is A
spring constant k
suppose m is the mass of block so its natural frequency of oscillation is given by
When three identical springs is connected in series
Natural Frequency becomes
Thus maximum speed with Amplitude A is
so by a factor of maximum velocity is changed
the friction if sliding is greater than rolling
4.85 x 104.
This is the right answer.
Answer:
At least 6 N, assuming that the rope has a length of more than 2 meters.
Explanation:
In general, if it takes a force of newtons to lift an object at height , the work done lifting the object from to can be found using the definite integral about :
.
If the value of is a constant regardless of height , then the result of the integral would be
.
However, in this case the value of does depend on the value of .
- At height , nothing is being lifted. The amount of force required would be zero.
- At height , one meter of the rope is in the air. That requires a force of at least .
- In general, at a height of meters, the force required would be at least Newtons.
In other words, where is in Newtons and is in meters.
Evaluate the integral:
.