FORCES AND MACHINES

BY:MARIA AND GEMMA

FORCES CAN PUT OBJETS INTO MOTION.A FORCE CAN PUT AN OBJECT INTO MOTION STOP AN OBJECT OR CHANGE THE WAY THAT IT MOVES .A FORCE CAN ALSO DEFORM OR BREAK AN OBJECT.

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TYPES OF FORCE• CONTACT FORCES• Contact forces act on objects by

making physical contact.

• NON-CONTACT FORCES• Non-contact forces act on objects

without making physical contact-.

GRAVITY

The forc

e of g

ravi

ty is

a n

on-

conta

ct fo

rce th

at att

ract

s

objets

toward

s th

e Eart

h.

MACHINES

A machine is an instrument that multiplies the force.•SIM

PLE MACHINES

•Have usually got one or two parts.

•COMPLEX MACHINES

•Have got many parts.

TYPES OS SIMPLE MACHINES

A lever consists of a rigid bar that turns on a fixed point called the

fulcrum.

A pulley is a wheel with an axle in the centre and a rope that turns

around.

Ramps are inclined planes that we can use to go up and down . We can also use them to move

heavy loads.

COMPLEX MACHINESA complex machine is a combination of two or more simple machines.