Gravitational Force and Mass

Mass is not the gravitational force or pull on an object.

• Mass refers to the amount of material in an object.

• Mass is the same as weight.

• Mass is a measure of gravitational force.

• Mass is only relevant in space.

The moon has 1/6 the gravity of Earth, approximately 10 m/s². If an object has a mass of 120 kg, its approximate weight on the moon is 200 N.

• Weight on the moon is calculated using the formula: Weight = Mass × Gravity.

• Weight on the moon is calculated using the formula: Weight = Mass ÷ Gravity.

• Weight on the moon is calculated using the formula: Weight = Mass + Gravity.

• Weight on the moon is calculated using the formula: Weight = Mass - Gravity.

Your weight on Mars is about 1/3 of your weight on Earth because Mars has a smaller force of gravity than Earth.

• Mars has less mass than Earth, resulting in a weaker gravitational pull.

• Mars has a larger mass than Earth, resulting in a stronger gravitational pull.

• Mars has the same mass as Earth, resulting in equal gravitational pull.

• Mars has a stronger gravitational pull due to its proximity to the Sun.

Two objects with the same mass will have the same weight if placed on the same planet.

• True. Weight depends on mass and the gravitational acceleration of the planet, so identical masses experience identical weights on the same planet.

• False. Weight is independent of mass and only depends on the volume of the objects.

• True. Weight is the same for all objects regardless of their mass.

• False. Weight varies with the distance from the planet's center, not just mass.

Every object exerts a gravitational force on every other object in the universe.

• True. Gravitational force exists between all objects with mass, regardless of their size or distance.

• Only large objects exert gravitational force.

• Gravitational force only exists between objects that are close together.

• Gravitational force is only present in celestial bodies.

A person will weigh more on Earth than on the Moon.

• True. The Moon has a smaller gravitational force than Earth due to its lower mass.

• False. A person weighs the same on both Earth and the Moon.

• True. Weight is constant regardless of the celestial body.

• False. A person weighs less on Earth than on the Moon.

Gravitational force acts at a distance, even if objects are not touching each other.

• True. Gravity is a non-contact force that can act between objects separated by space.

• False. Gravitational force only acts when objects are in direct contact.

• True. Gravitational force requires physical contact between objects.

• False. Gravity does not exist unless objects are touching.

Gravitational force weakens as the distance between two objects increases.

• True. Gravitational force is inversely proportional to the square of the distance between two objects.

• False. Gravitational force remains constant regardless of distance.

• True. Gravitational force increases with distance.

• False. Gravitational force only depends on the mass of the objects.

A feather floats to the ground rather than falling straight down because it is affected by air resistance.

• Air resistance has no effect on the feather's descent.

• Air resistance slows the feather's descent, preventing it from falling straight down like heavier objects.

• The feather is too light to fall quickly.

• The feather is pushed upwards by the wind.

A ball with a mass of 20 kg accelerates at an average rate of 10 m/s² during free fall. This indicates that the ball is in free fall.

• Free fall occurs when the only force acting on an object is gravity, causing it to accelerate at 10 m/s².

• Free fall occurs when an object is thrown upwards with an initial velocity.

• Free fall occurs when an object is at rest and not moving.

• Free fall occurs when an object is moving horizontally at a constant speed.