Answer:
Explanation:
Given
Original Frequency 
apparent Frequency 
There is change in frequency whenever source move relative to the observer.
From Doppler effect we can write as

where
apparent frequency
v=velocity of sound in the given media
velocity of source
velocity of observer
here 




i.e.fork acquired a velocity of 
distance traveled by fork is given by

where v=final velocity
u=initial velocity
a=acceleration
s=displacement



Answer:
This is the formula
Explanation:
−(0.54 m/s)2
2(−1.67 m/s2)
so this is the step by taking the mean of the maximum value of friction with the minimum value you can get the average force of friction
Answer:

Explanation:
Given,
Distance travelled ( d ) = 176.4 meters
Time taken ( t ) = 4.5 seconds
<u>Finding </u><u>the </u><u>speed </u><u>of </u><u>a </u><u>cheetah</u>
Speed 


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<u>Let's </u><u>learn </u><u>about </u><u>Speed </u> :
Suppose a body moves 20 m in 2 seconds, either on a curved path or on a straight path. So , 10 m is the distance travelled by the body in each second which can be written as 10 m/s. This is called speed of the body. Thus, <u>Speed </u><u>is </u><u>defined </u><u>as </u><u>the </u><u>distance</u><u> </u><u>travelled</u><u> </u><u>per </u><u>unit </u><u>time.</u> It is the rate of distance travelled by a body.
Mathematically,

In SI system, the unit of distance is metre and time is second. Thus , the <u>SI </u><u>unit </u><u>is </u><u>speed </u><u>is </u><u>m/</u><u>s.</u>
Hope I helped!
Best regards!!
Answer: I’m assuming you meant how long instead of how pond? If so then it would take approximately 6.762 hours
Explanation:
5.25 x 6.762 = 35.5005