12 Questions
What is the unit of mass used to measure light objects?
Gram
What is the factor of mass conversion between grams and kilograms?
1 Kg = 1,000 g
What is a force?
A push or pull
When two forces are acting on an object and are not equal in size, what do we call them?
Unbalanced forces
What type of force is air resistance?
Frictional force
When a living creature puts pressure on an object, what type of force is it called?
Applied force
What does mass measure?
Heaviness of an object
Which unit of mass is used to measure heavier objects?
Kilogram
What happens when forces are balanced?
The object doesn't move
What is the reason behind air resistance?
Bumping into air atoms and molecules
What is the effect of unbalanced forces on an object?
The object begins to move
How do we describe forces that are equal in size but opposite in direction?
Balanced forces
Study Notes
Mass and Units
- Mass is a measure of how heavy an object is.
- The gram (g) is a small unit of mass used to measure light objects.
- The kilogram (Kg) is a larger unit of mass used to measure heavier objects.
- 1 kilogram (Kg) is equal to 1,000 grams (g).
Forces
- A force is a push or pull.
- Forces can be either balanced or unbalanced.
- When forces are balanced, the object doesn't move.
- When forces are unbalanced, the object will begin to move, stop moving, change direction, speed up, or slow down.
Balanced and Unbalanced Forces
- Unbalanced forces cause a change in motion by changing the object's speed or direction.
- Balanced forces do not cause a change in motion.
- When two forces are acting on an object and are not equal in size, they are unbalanced.
- When two forces acting on an object are equal in size but opposite in direction, they are balanced.
Types of Forces
- Air resistance force is friction between an object and the air.
- Air resistance is caused by an object bumping into atoms and molecules when moving through the air.
- Applied force is when a living creature puts pressure on an object.
Test your knowledge on the concepts of mass, weight, and force. Explore questions related to measuring mass in grams and kilograms, understanding the conversion factor between grams and kilograms, and identifying the effects of balanced and unbalanced forces on objects.
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