Flashcards: Gravity on Earth

What is gravity?

Gravity is a force that pulls objects towards each other. It's what keeps us on the ground.

Who discovered gravity?

Isaac Newton discovered the concept of gravity in the 17th century.

True or false: Gravity is stronger on the Moon than on Earth.

False, because the Moon's gravity is about 1/6th that of Earth's.

What does gravity depend on?

Gravity depends on mass and distance. More mass means more gravity.

Fill in the blank: The force of gravity on Earth is measured in _____ per kilogram.

Newtons (N).

Difference between weight and mass.

Weight is the force of gravity on an object. Mass is how much matter is in it.

Effects of gravity on objects.

Gravity causes objects to fall, keeps planets in orbit, and affects tides.

What is the acceleration due to gravity on Earth?

About $\displaystyle 9.81 ext{ m/s}^2$. This is how quickly objects speed up when falling.

True or false: Gravity can be turned off.

False, because gravity is always present unless you are in space.

Question: How does gravity affect our daily lives?

It keeps us grounded, affects how we move, and shapes our environment.

Question: How do astronauts experience gravity in space?

They experience microgravity, which makes them feel weightless.

True or false: Increasing distance from Earth decreases gravity.

True, because gravity weakens as you move further away.

What happens to an object in free fall?

It accelerates downwards due to gravity without air resistance.