a 727 jet needs to attain a speed of 200 mph to take off. if it can accelerate from 0 to 200 mph in 30 seconds, how long must th
1 answer:
You might be interested in
The basic relationship between the frequency of a wave and its period is
where f is the frequency and T the period of vibration.
In our problem, the frequency is
so, by re-arranging the previous formula, we can find the period of the wave:
where f is the frequency and T the period of vibration.
In our problem, the frequency is
so, by re-arranging the previous formula, we can find the period of the wave:
Answer:
tension is 0.692 N
magnetic force is 0.401 N
Explanation:
given data
mass = 57.5 g = 0.0575 kg
long = 38.8 cm = 0.388 m
displace = 22.5 cm = 0.225 m
to find out
free-body diagram , tension and magnetic force
solution
we consider here angle is θ
so free body diagram is attach below
and
here cosθ = x/l
so θ = cos^-1 ( 0.225 / 0.388)
θ = 54.6°
so tension from net force is
net vertical force
t sinθ - F(g) = 0 ...........1
t = F(g) / sinθ
t = mg /sin54.6
t = 0.0575 ( 9.8) / sin54.6
t = 0.692
so tension is 0.692 N
and
net horizontal force
- t cosθ + F(magnetic) = 0 ....................2
t cosθ = F(magnetic)
put here all value
F(magnetic) = 0.692 × cos 54.6
F(magnetic) = 0.401
so magnetic force is 0.401 N
