11. A book with many printing errors
contains the following four different
equations for the displacement y
of a particle undergoing a certain
was di
periodic motion:
(a) y = sin
2100
T
(b) y = sin (vt).
A
(c) y = --sin
7
0
and
A
(a) y = (1052)s cos
21
T
where A is maximum displacement
of the particle, v is speed of the
particle, t is the time and T is the
periodic time. Find out the wrong
equations on dimensional grounds
t
2 Precio

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.