Answer:
d= 1.5 g/cm3
Explanation:
datos
m= 30g
v= 20cm3
d=?
formula
d= m / v
solución
d= 30g / 20cm3 = 1.5g/cm3
30ms
you need to multiple the 10ms by 3s which gives you 30ms
yes it is easy
Answer: 810 J
Explanation: work W = F·s = 101 N · 8.0 m = 808 J
Force F = u mg = 101 N in which u is friction constant. Also mass is included in force.
F = 5
F = m x v^2/r = 2 x 10^2/5 =200/5 = 40 (N)
