Physics
t=sqrt{2h/g} v=L/t
physics
φ=31⁰π/180⁰ = 0.54 rad. n = 900 rev/min =900/60 =15 rev/s t=φ/ω= φ/2πn=0.54/2π•15=0.006 s v=d/t =0.8/0.006 = 133 m/s
physics
See my answer to a similar question below under related questions.
Physics
t=sqrt{2h/g}
physics
D) {4•100 +4•80} – sqrt(400² +80²) = 72 m
physics
Upward motion: h=v₀t-gt²/2 v= v₀-gt v=0 => t=v₀/g h= v²/2g =30²/2•9.8=45.9 m t=sqrt{2h/g} =sqrt{2•45.9/9.8} = 3.06 s. t(total)=2•t = 2•3.06 =6.12 s.
science-physics
W•0.67 = 183•(1.4-0.67) +107•(2.8-0.67) W={183•0.73+107•2.13}/0.67=540 N
Physics
λ =v/f=330/320 = ... m
physics
Velocity in the stretched string is v = sqrt(TL₀/m) = =sqrt(570•0.92/0.0037) = 376 m/s, λ =2L =2•0.65 = 1.3 m, λ = v/f => f=v/λ =376/1.3=289 Hz.
Physics
mgh = mv²/2 v=sqrt{2gh}
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