Question

Tolong caranya yaa no.31&32

Answer 1

31
m = 5kg
vo=0
s=100m
t=10s
F=?

s= vot+1/2 a t²
100 = 0 + 1/2 a 10²
100=50a
a= 2m/s²

F= m a
F = 5x2
F = 10N

32
m= 1000kg
vo=v
vt= 4v
W= 30kJ
 v=?

W=1/2 m(vt²-vo²)
30000 = 1/2 1000 ((4v)²-v²)
60 = 15v²
4 = v²
v = 2 m/s