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}
Physics helpp
F-F(gr) = ma a= {F-F(gr)}/m = =(15-10)/15=0.33 m/s² (upward)
science physics
1,2). k =9•10⁹ N•m²/C², q₁=5 C, q₂= - 2.5 C. F=k•q₁•|q₂|)/r² = =9•10⁹•5•2.5/1.75² =3.67•10¹⁰ N (to the right). 3). E=k|q₂|/r² =9•10⁹•2.5/1.75&#...
physics
k =9•10⁹ N•m²/C² F=k•q₁•q₂/r² = =9•10⁹•5•2.5/1.75² =3.67•10¹⁰ N (to the right)
physical science
a=F/m = 14000/2500 =5.6 m/s^2
Physics
m=14 kg F=ma=14 x 1.5 = 21 N
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