Forces Flashcards
What is physics?
Physics is the study of how objects interact, move, and are affected by forces.
What is the main goal of physics?
To understand how the universe behaves.
What is energy?
Ability to do work.
Force
A force is a push or a pull that acts on an object due to the interaction with another object.
Motion
Motion is the change in position of an object with respect to time.
Light
A type of electromagnetic radiation that makes the object visible to the eye.
Sound
Is a vibration that travels as a wave through a medium.
Waves
are a disturbance that transfers energy from one place to another.
Electricity
Is the flow of electrical power or charge.
Astronomy
The study of my everything in the universe beyond the earth’s atmosphere.
Nuclear
The energy in the core of an atom.
A force is…
a push or a pull.
a twist or a turn.
Identify the change of force on a car driving forward?
Speed.
Identify the change of force when a ball is bounced?
Direction
Identify the change of force on a bow when a bow is loaded.
Shape
How is force measured?
Using a Newtown meter.
The unit of force is measured in….
Newtons (N).
Match the forces to their description:
A force created by gravity pulling an object.
Weight
Match the forces to their description:
An opposing force created when an object has to move through air.
Air resistance
Match the forces to their description:
A force that pushes an object up when it is in a liquid.
Upthrust
Match the forces to their description:
Force created when two objects rub together.
Friction.
Match the forces to their description:
A force when an object is. Moved either forwards or backwards.
Push or Pull.
What equipment is used to measure force?
Newton meter.
What forces are trying to stop a car moving?
Air resistance, friction, weight.
Which force always goes against moving objects?
Air resistance.
Which force causes objects to float in water?
Up thrust
Which force slows down objects which are moving through the air?
Air resistance
Which force causes objects to be pulled towards the ground.
Gravity
If the forces are equal the object will…
Be stationary or stay moving at the same speed.
If the forces on an object are different, the object will change…
Size, shape or direction
Which forces could affect a cars speed?
DF, friction, AR and gravity.
What factors would increase the speed of the car?
Increasing the forward force.
Decreasing the air Resistance.
Decreasing the weight.
An object in water has two forces acting upon it…
Upthrust
Weight
What is upthrust?
The upward force exerted by a liquid on the object.
What is weight?
The force of gravity on the object.
Why does the boat float?
The forces of weight and upthrust are balanced.
Why do dive toys sink?
Because weight is greater than upthrust.
How to measure volume of liquids accurately?
With the eye in line with the water level at the bottom of the curve.
What is the curve called when measuring the volume of liquids.
Meniscus
Volumes of liquids can be measured in…
Litres L
Millimetres ML
How can we measure the volume of a shape which is irregular?
Fill the measuring cylinder. Measure water.
Put in stone and measure again.
What is density?
Mass
______
Volume
The density is known as it’s
Mass per unit volume.
What is the unit of density?
Grams per cubic centimetre
g/cm3
How do you calculate volume?
Volume= length x width x height
What equipment is used to find out the mass of an object?
Top-pan balance
What is the Density equation?
Density=mass ÷ volume.
Density =400g ÷120cm3
Float or sink?
If the density is greater than 1g/cm3 it will
Sink
Float or sink?
If the density is less than 1g/cm3 it will…
Float
What is the density of water?
1g/cm3
What is the density of water?
1g/cm3
Calculate the density of:
Block of copper: 3cm.long, 2cm high, 2cm wide. It has a massive of 108g
9g per cm3
Block of aluminium length 5cm, height 1cm, width 2 cm and mass of 27g.
2.7g per cm3
How would you find density of the metal clip?
Find volume in the cylinder of water
Measure mass on top pan balance.
Density= mass
——–
Volume
What are magnetic fields?
The region where it has a magnetic effect.
What happens when a magnetic material is placed in a magnetic field?
It will experience a force.
What materials are magnetic?
Common uses of magnets?
Fridge magnet
Compass
Scrap yard
Metal detector
Where is the strength of the magnetic field greatest?
At the poles north and south.
What happens when you bring two north poles alike together.
Repell
What can know about the magnetic fields.
They never touch or cross.
Continuous.
Closer together the stronger the force.
North to south
What happens when you bring North and south pole together?
Attract
What happens when you bring two south poles together?
Repel moving away from each other.
Is the earth is a magnet?
True
Volume is the
Space occupied by an object
Weight is
Force due to gravity acting on a massive measured in newtons.
Upthrust is…
Upwards force of a liquid on an object placed on its surface.
Streamlined means
Objects designed with smooth and curved surface to minimise opposing forces such as air resistance or drag.
Streamlined means
Objects designed with smooth and curved surface to minimise opposing forces such as air resistance or drag.
