Science - year 8 exam - Forces Flashcards
Define the term force.
The strength of e____ from a physical action and movements.
Define the term force.
The strength of energy from a physical action and movements.
Give an example of each of the following types of forces:
Push Force
An action that forces and object or person to move from its current s____
Pull Force
The force of which an object can be a_______ towards a magnetic, gravitational, or p______ pull
Twist Force
Force that is portrayed by a m_______ through torque
Give an example of each of the following types of forces:
Push Force
An action that forces and object or person to move from its current state
Pull Force
The force of which an object can be attracted towards a magnetic, gravitational, or physical pull
Twist Force
Force that is portrayed by a material through torque
Explain the difference between a contact force and a non-contact force.
A contact force is any force that requires c_____ to occur.
A non-contact force is a force which acts on an object without coming p_______ in contact with it.
Explain the difference between a contact force and a non-contact force.
A contact force is any force that requires contact to occur.
A non-contact force is a force which acts on an object without coming physically in contact with it.
What is the difference between unbalanced forces and balanced forces?
There is no change in speed or d_______.
What is the difference between unbalanced forces and balanced forces?
There is no change in speed or direction.
What is gravity?
Gravity, is a natural phenomenon by which all things with mass or e____ including planets, stars, and g______, are a______ to one another.
What is gravity?
Gravity, is a natural phenomenon by which all things with mass or energy including planets, stars, and galaxies, are attracted to one another.
Is gravity a contact or a non-contact force. Explain
Non contact force: because it attracts smaller objects and lifeforms towards its c_____.
Is gravity a contact or a non-contact force. Explain
Non contact force: because it attracts smaller objects and lifeforms towards its centre.
What are the two factors that influence the amount of gravity between objects?
M___, and d_______
What are the two factors that influence the amount of gravity between objects?
Mass, and distance
Identify the following forces as being contact or non-contact force:
Friction, Gravity, Magnetism, Electrostatic, Buoyancy,
- Contact
- Non-contact
Identify the following forces as being contact or non-contact force:
Friction, Gravity, Magnetism, Electrostatic, Buoyancy,
- Contact - Friction, Buoyancy, Electrostatic
- Non-contact - Gravity, Magnetism
Describe why a persons weight would be different on different planets.
Because the g__________ pull will make your body either lighter or heavier on that certain p____.
Describe why a persons weight would be different on different planets.
Because the gravitational pull will make your body either lighter or heavier on that certain planet.
What is meant by the ‘poles’ of a bar magnet?
N____ and S____ attracting each other
What is meant by the ‘poles’ of a bar magnet?
North and south attracting each other
Describe what happens when you place each of the different poles of a magnet near one another.
They get a_______ to one another and pull close together.
Describe what happens when you place each of the different poles of a magnet near one another.
They get attracted to one another and pull close together.
Describe an every day example of how can you build up an electrostatic charge on an object.
R______ or s______
Describe an every day example of how can you build up an electrostatic charge on an object.
Rubbing or sliding
Describe why a balloon rubbed on your hair will then cause your hair to stick to it.
This creates a n_______ charged energetic force that is carried by e________.
Describe why a balloon rubbed on your hair will then cause your hair to stick to it.
This creates a negatively charged energetic force that is carried by electrons.
Buoyancy
Which of the following is the application of buoyant force?
A) hot air balloon
B) ship
C) submarine
D) all of these
Buoyancy
Which of the following is the application of buoyant force?
A) hot air balloon
B) ship
C) submarine
D) all of these
What would happen to a boat if a load was being placed on it, and the force of gravity became greater than the force of buoyancy?
The object will rise to the s_______ and float.
What would happen to a boat if a load was being placed on it, and the force of gravity became greater than the force of buoyancy?
The object will rise to the surface and float.
