Understanding Gravity and Forces

The video tutorial by Mr. Sonberg covers the concepts of forces and weight for Science 7 students. It explains the definition of force as a push or pull on an object, measured in Newtons. The tutorial discusses how to measure force using a force meter or spring scale and clarifies the difference between mass and weight. It introduces Sir Isaac Newton's concept of gravity and explains how gravitational force depends on the mass of objects and the distance between them. The gravitational constant is also discussed, highlighting its impact on weight, especially in different environments like the moon or space.

What is the unit of measurement for force?

• Joules

• Pascals

• Newtons

• Watts

Which device is used to measure force?

• Thermometer

• Barometer

• Force meter

• Voltmeter

What is the main difference between mass and force?

• Mass is measured in Newtons, force in kilograms

• Mass is the amount of matter, force is a push or pull

• Mass is a force, force is not

• Mass and force are the same

Who is associated with the concept of gravity?

• Nikola Tesla

• Galileo Galilei

• Albert Einstein

• Sir Isaac Newton

What did Sir Isaac Newton call the force that pulls objects together?

• Magnetism

• Gravity

• Inertia

• Friction

What two factors determine the gravitational force between two objects?

• Mass and volume

• Distance and speed

• Mass and distance

• Volume and density

How does the weight of an object change with distance from Earth?

• Weight increases with distance

• Weight decreases with distance

• Weight remains constant

• Weight becomes zero

What is the gravitational constant on Earth?

• 9.5 m/s²

• 9.81 m/s²

• 10 m/s²

• 8.9 m/s²

How does the mass of an object differ from its weight?

• Mass and weight are identical

• Mass changes with location, weight does not

• Mass is affected by gravity, weight is not

• Weight is the force of gravity on mass

Why do astronauts feel weightless in space?

• Gravity is stronger in space

• Space has no air resistance

• There is no mass in space

• There is less gravitational force in space