Types of forces
This force pulls objects towards Earth.
Gravity
When forces are equal in size and opposite in direction, they are described this way.
Balanced
The distance travelled in a particular amount of time.
Speed
Force arrows point in this direction relative to the force.
The direction the force is acting
Grooves on the bottom of shoes help increase this force.
Friction
This force acts when two surfaces rub against each other.
Friction
A book resting on a table has this type of forces acting on it.
Balanced
The metric unit commonly used for speed.
m/s or metres per second
A longer arrow on a force diagram represents this.
A larger force
A larger parachute usually falls more slowly because it produces more of this force.
Air resistance or drag
This upward force acts on an object moving through the air.
Air resistance (or Drag)
These forces cause an object‘s speed or direction to change.
Unbalanced
A cyclist travels 100 m in 20 s. This is the cyclist’s average speed.
5 m/s
The downward arrow on a falling parachute represents this force.
Weight or gravitational force
Astronauts on the Moon weigh less because the Moon has less of this than Earth.
Gravity
This force is produced when a stretched or compressed spring returns to its original shape.
Elastic or spring force
A tug-of-war rope moves towards the red team. This team is applying this type of overall force.
Unbalanced
When an object becomes faster, it is doing this.
Accelerating or speeding up
The upward arrow on a falling parachute represents this force.
Air resistance or drag
A skydiver stops accelerating when air resistance equals their weight. This constant falling speed is called this.
Terminal velocity
Gravity and magnetism belong to this group of forces because objects do not need to touch.
Non-contact forces
A car travels in a straight line at a constant speed. The overall or net force on it is this value.
Zero Newtons
List names of 6 girls in our class
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A parachutist is falling at a constant speed. The relative sizes of the upward drag arrow and downward weight arrow should be shown this way.
Equal length
How many boys are in our class?
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