Question

As pdlt ol an exercise ruutirie, dn athlete does a set 이 dim ups shown IS d ur dph ut the d thlete s vertical speed ds she perilms a chin-up. If her mass is 75.3 kg calculate he torce exerted by the chin-up bar her hands for the given times. (nter the magnitudes in N.) 30 0 0.5 2.0 time (s) (a) 4-t0 (b) r = 0.55 (c) r= 1.1 s (d) t 1.6 s

Answer 1

slope of o of a goo graph at t oo.5 = m = 18 x 10-2 = 3x10 mi = 0.3 mis? 06 - ma = o.3x75.3 = 22.5 22.59 N b t = 0.55 F = 0.3x 75.3 = 22.59N slope of graph at t=2.1s O Fa oxas3 =ON to slope of graph at t=165 pa= -18x 10 = -18 8 10-2 1.7 -1.4 0.3 = -0.6 mis? - - -0. (X 2 = 4.48 – S1 & N