A solid Cute hug sides 0.50m
1 answer:
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Answer:
a)
b)
Explanation:
Given:
Frequency of the whistle, f = 564 Hz
Radius of the circle, r = 71.2 cm = 0.712 m
Angular speed, ω = 17.1 rad/s
speed of source, = rω = 0.712 × 17.1 = 12.1752 m/s
speed of sound, v = 343 m/s
Now, applying the Doppler's effect formula, we have
where,
= relative speed of the detector with respect to medium = 0
a) for lowest frequency, we have the formula as:
on substituting the values, we get
or
b) for maximum frequency, we have the formula as:
on substituting the values, we get
or
Answer:
Explanation:
Given
mass of projectile
initial horizontal speed
height
Considering vertical motion
velocity gained by projectile during 26.7 m motion
v=final velocity
u=initial velocity
a=acceleration
s=displacement
Horizontal velocity will remain same as there is no acceleration
final velocity
Initial kinetic Energy
Final Kinetic Energy
Work done by all the force is equal to change in kinetic Energy of object
Work done by gravity is