Answer:
the third answer
Step-by-step explanation:
4 to the 4th power (which eliminates the first two answers) and since I is raised to the second power, you multiply them and get 8
256h28k8
24 kg
You start by calculating the linear mass density of the rod:
d = m/L = (40 kg)/(5 m) = 8 kg/m
So for a 3-m long bar, the mass can be calculated as follows:
m = d×L = (8 kg/m)(3 m) = 24 kg
