Science

Force- a push, pull, or twist in a specific direction 

Force meter- used to measure forces 

Mass- times gravity equals weight 

Weight- depends on gravity and is measured in newtons; the pulling force of gravity on an object 

Formula- weight = mass x gravity 

Weight = 9.8N x M 

Mass- the amount of matter in an object and stays the same everywhere (measured in kg) 

Contact force- a push, pull or other impact xd

Non-contact forces- electrostatic, magnetic force, gravity force 

Balanced forces- when two or more forces that act on object are equal in all directions (results in no change of movement) 

Unbalanced forces- when two or more unequal forces act on an object  

Net force- the difference between two forces 

Balanced force- when an object is balanced and cancels each other out 

Unbalanced forces- when an object moves due to a/ multiples force acting upon it. They cause an object to: start moving, speed up, slow down, come to a stop, change direction  

Fein- zara 

Friction- the force between two things rubbing together that makes them slow down relative to each other (a contact force) 

Impact- when one force hits another 

Air resistance- drag in the air 

Drag- friction between a gas, liquid and solid 

Streamlining- to reduce air resistance or drag on an object 

Friction is always the opposite way to motion because it pushes against it 

Electrostatic force- the attraction or repulson of objects that have an electric charge 

Non-contact forces- gravity, magnetic, electrostatic 

Magnetic- attraction or repulsion between magnetic materials and/or moving objects with electric charge 

Gravity- a weak non-contact force of attraction between any 2 objects 

The strength of the gravitational field on Earth- 9.8N/kg 
Size and gravity- the bigger the object's mass, the stronger the gravity and the more it attracts other masses nearby. The gravity on the moon is less than Earth, which causes astronauts to be able to jump around 

Gravitational field- if an object lies within a region called the Earth's gravitational field, then the gravitational force will act upon it (called the force field)