Study

Forces and machines

  •   0%
  •  0     0     0

      Back   Restart
  • CORRECT: Films changed culture in the 19th century.
    Films changed culture in the 20th century.
  • Write to complete: There are different forms of energy, such as __________________ energy, electrical energy, chemical energy and light energy.
    mechanical
  • CORRECT: Computers have changed the way we play in offices.
    Computers have changed the way we WORK in offices.
  • What is a force? Write it.
    It is a push or pull on an object.
  • CORRECT: Transports help people to travel long distances in long periods of time.
    Transports help people to travel long distances in SHORT periods of time.
  • What type of force is acting in the pictures?
    Contact force
  • It is a wheel with a rope or a chain around it.
    Pulley
  • We live longer and better today thanks to invention in medical technology. TRUE OR FALSE
    TRUE
  • What type of force is acting in the pictures?
    Non-contact force
  • Write to complete: All machines require ________ to work.
    energy
  • What type of force is the gravity?
    Non-contact force
  • Write to complete: Simple machines have only one or a few _________.
    parts
  • What type of force is acting in the pictures?
    Non-contact force
  • The computers were made in the mid-20th century. TRUE OR FALSE
    TRUE
  • It is a solid bar that turns on a fixed point of support.
    Lever
  • It is a ramp used to move objects up a down more easily.
    Inclined plane
  • CORRECT: Before electricity people or telephones carried messages.
    Before electricity people or HORSES carried messages.
  • It is a system that send signals without cables.
    Radio
  • What effects on objects have a force? Write 2 examples:
    Change shape, break an object, start a movement or stop a movement.
  • James Watt invented the printing press. TRUE OR FALSE
    FALSE
  • It’s a machine that uses energy from coal to make it work.
    Steam engine
  • What force is responsible for the movement of the Moon around the Earth?
    Gravity
  • What type of force is acting in the pictures?
    Contact force
  • What is a contact force? Say it.
    It happens when two objects touch each other.
  • Write 2 examples of simple machines
    Pulley, inclined plane and lever
  • Johannes Gutenberg invented the printing press. TRUE OR FALSE
    TRUE
  • Write to complete: A __________________ is a device that does a task.
    machine
  • What type of force is acting in the pictures?
    Non-contact force
  • How have machines changed throughout history?
    First they were made of stone, wood... then they were made of metals, after that they use coal as energy and today most use electricity or fuel to work
  • It’s an electronic device that store and process information.
    Computer
  • Today, most machines use coal to work. TRUE OR FALSE
    FALSE
  • It is a type of energy used to make some machines work.
    Electricity
  • It is a machine that makes possible to make copies of a lot of books.
    Printed press
  • A contact force happens when two objects touch each other. TRUE OR FALSE
    TRUE
  • A non-contact force happens when two objects touch each other. TRUE OR FALSE
    FALSE
    • Your experience on this site will be improved by allowing cookies.