Answer:
Jan Hendrik Schön I believe
A. 6000 N
Explanation:
v²=u²+2as
0²=20²+2x30xa
-400=60a
a=-400/60
a =-6.667m/s²
f =ma
f = 900 x 6.667 = 6003N
F = 6000N
a cat grooming itself
work is distance * force so 15*100=1500
and to find time you know power = diastance * force / time
so 25=15*100/t
25=1500/t
25/1500=t
.016=time
