Mass Vs. Weight & Air Resistance, Gravity and Free Fall

True or false: Mass is the gravitational force/pull on an object.

True or false: Every object exerts a gravitational force on every other object in the universe.

True or false: A person will weigh more on the moon than on Earth.

True or false: Gravitational force weakens as the distance between two objects increases.

True or false: All objects in free-fall fall to Earth at the same acceleration.

Use $$w=mg$$ and gravitational acceleration $$=10\ \text{m/s}^2$$ . A farmer brings his prize pumpkin to the fair. If the mass of the pumpkin is $$140\ \text{kg}$$ , what is its weight?

Use $$w=mg$$ . If an object on Mars weighs $$45\ \text{N}$$ and the acceleration due to gravity on Mars is $$3.8\ \text{m/s}^2$$ , what is the mass of the object?

Which statement is correct?

Your weight on Mars is only about one third of your weight on Earth. Which reason best explains this?

The moon has $$\tfrac{1}{6}$$ the gravity of Earth (assume Earth $$g\approx10\ \text{m/s}^2$$ ). If something has a mass of $$120\ \text{kg}$$ , what will be its approximate weight on the moon?