Final answer:
The weight of the textbook on Earth is 119.56 N, on Mars is 45.14 N, and the strength of gravity on Venus is 0.787 N/kg.
Step-by-step explanation:
The weight of an object can be calculated using the formula: weight = mass * gravitational acceleration. On Earth, the weight of the textbook would be:
Weight on Earth = mass * g
Weight on Earth = 12.2 kg * 9.8 m/s² = 119.56 N
On Mars, the weight can be calculated using the formula:
Weight on Mars = mass * g
Weight on Mars = 12.2 kg * 3.7 m/s² = 45.14 N
The strength of gravity on Venus can be calculated using the formula:
Strength of Gravity on Venus = weight / mass
Strength of Gravity on Venus = 9.6 N / 12.2 kg = 0.787 N/kg