Ajetliner of mass 8.70×104 kg is in level flight when it encounters a downdraft (a downward wind) that lasts for 1.20 s . the vertical component of the jetliner's velocity is 71.5 m/s after the downdraft subsides. what is the downdraft's average force, f, on the jetliner?

Natural forces that can alter ecosystems include seasons and climate changes. t or f

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?