How many newtons does a 5 kg backpack weigh on the moon?

To calculate the weight of a 5 kg backpack on the Moon, you can use the formula: weight = mass × gravitational acceleration. The gravitational acceleration on the Moon is approximately 1.62 m/s². Therefore, the weight of the backpack is 5 kg × 1.62 m/s² = 8.1 newtons.