Tính điện trở Rab của các mạch điện sau
a, R1=3 ôm , R2=R3=R4=2 ôm
b, R1=R2=R3=R4=5 ôm

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west