Answer:
Explanation:
Given
Distance between two loud speakers
Distance of person from one speaker
Distance of person from second speaker
Path difference between the waves is given by
for destructive interference m=0 I.e.
frequency is given by
where
For next frequency which will cause destructive interference is
i.e. and
frequency corresponding to this is
for
Frequency corresponding to this wavelength
Answer:
a)Velocity of car =v=16 m/s
b)Force against the track at point B=1.15*N
Explanation:
Given mass of roller coaster=m=350 kg
Position of A=Ha=25 m
Position of B=Hb=12 m
Net potential energy=mg(ha-hb)
Net potential energy=(350)(9.80)(25-12)
Net potential energy=44590 J
Using energy conservation
net kinetic energy=net potential energy
(1/2)mv^2=mg(ha-hb)
m=350
velocity=v=16 m/s
b)There two force acting,centripetal force upward and gravity downward.
Thus net force acting will be
Net force=(mv^2/r)-mg
Net force=14933.33-3430
Net force=1.15* N