A student was trying to find the relationship between mass and force. He placed four different masses on a table and pulled them
2 answers:
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Answer:
f = 409 Hz
Explanation:
We have,
Length of the open organ pipe, l = 0.29 m
Frequency of vibration of second overtone,
It is required to find the fundamental frequency of the pipe. For the open organ pipe, the frequency of second overtone is given by :
v is speed of sound
Let f is the fundamental frequency. It is given by :
The relation between f and f₂ can be written as :
So, the fundamental frequency of the pipe is 409 Hz.
Answer:
Work done is 1.31 J.
Explanation:
Given:
Length of the ramp (L) = 5.0 mm
Height of the top end (H) = 1.4 mm
Horizontal force applied (F) = 270 N
Work done (W) = ?
We know that,
Work done is equal to the product of force and displacement caused along the line of application of force.
Here, the force acting on the refrigerator is in the horizontal direction while the refrigerator is moving down along the length of the ramp. So, we have to first find the horizontal component of the displacement caused.
Now, consider the triangle ABC representing the given situation. The point A is the top end point of the ramp, AB is the length of the ramp, AC is the vertical displacement of the refrigerator and BC is the horizontal displacement of the refrigerator.
Using Pythagoras theorem,
Now, force applied on the refrigerator is in the direction opposite to the horizontal component of displacement. So, work is negative.
Work = Force × Horizontal displacement
Therefore, work done is 1.31 J.
