Final answer:
The weight of the 135kg barrel is 1323 Newtons (N), calculated using the formula w = mg, with g as the acceleration due to gravity (9.80 m/s²).
Step-by-step explanation:
To calculate the weight of a barrel, we use the formula w = mg, where m is the mass of the barrel and g is the acceleration due to gravity. In this case, the mass (m) of the barrel is 135 kg and the acceleration due to gravity (g) is 9.80 m/s² on Earth. By plugging these values into our equation, we get:
w = (135 kg)(9.80 m/s²) = 1323 N.
Therefore, the weight of the barrel is 1323 Newtons (N).