The two opposite forces applied to the table are not equal.
Unbalanced forces
Big objects has a....pull towards their centre than...objects.The Earth has a....pull on the Moon that the Moon has on the Earth.
stronger, smaller, stronger.
Archimedes, and Ancient Greek scientist, discovered...
upthrust
Gravity...
is a non-contact force that pulls towards the centre of objects. This force is only noticeable with very large objects.
Because of gravity...
we stay on the ground, every thing that goes up comes back down.
Unbalanced forces examples...
push and pull force speed up the wing, chocolate breaks, a push force stops the ball...
The... and... of an object influence the amount of....
mass, volume and upthrust.
Mass...
is the amount of matter in an object. It's measured in kilograms (kg).
Some poles of a magnet...
repel
Upthrust...
is a force applied by water and air. It pushes objects in air and water up, It is an opposite force to gravity.
There are two types of forces...
contact and non-contact forces
The finger applies a force to the marble...
contact force
Magnets have a force called....This can be a... force....... is a..... force because a magnet moves an object.......
Magnetism, push or pull, non-contact force, without touching it.
An object with a... mass and a... volume, has... upthrust.
small, big and a lot of.
Push and pull forces are...This means one object or person moves another by touching it.
Contact forces
Opposite poles of a magnet...
attract
Because of magnetism...
the boy can't push the magnets together, the nails move towards the magnet. the fridge magnet stays on the door.
An object with a... mass and a... volume, has.. upthrust.
large, small, less
Balanced forces, weight= upthrust:
float
Push and pull forces are...This means they move objects without touching them.
non-contact force
Weight...
is a force. It's mass x gravity. Weight is measured in newtons (N).
The two forces applied to the table are opposite and equal.
Balanced forces
Magnets create a....around them. We cannot see these forces but they....objects made of......
magnetic field, iron and steel.
...is the ability of an object to float in a liquid.
Buoyancy