## Simple Machines - Questions

Practice Page 1

 Q1. State True (T) or false (F). a. b. c.   d. e.      f. A fixed pulley acts as a second class lever. ___________ A lever’s balance point is called its fulcrum. _________ Simple machines are the most complex machines that we use daily to make work easier.___________ An inclined plane helps a person to move or raise heavy objects._______ Wheelbarrow is an example of Class – II Lever. ___________ The wheel and axle is a first class lever.___________ Q2. Fill in the blanks. a. b. c. d.      e.   f. A car jack is an example of ____________________ lever. A person using a hockey stick is an example of ________________ lever. A __________ is an inclined plane that goes round and round. A wheel and _____________ together act as a simple machine. ____________ are devices, which help us to do a great deal of work with less effort. A lever’s balance point is called its ______________. Q3. Match the following. Ramps for wheel chairs Wheel and Axle An inclined plane wrapped around a cylinder Second class levers A windmill Inclined plane A pair of nutcrackers Screw Lifts the automobile with less effort Jack

Practice Page 2

 Answer the following: What is a machine? ___________________________________________________________ ___________________________________________________________   Compare a screw and a nail. ___________________________________________________________ ___________________________________________________________   Give an example of natural inclined plane. ___________________________________________________________   List any 3 simple machines you use in your daily life. ___________________________________________________________   Write at least 3 examples for each of the following: Class – I Lever  ______________________________________________ ___________________________________________________________ Class – II Lever ______________________________________________ ___________________________________________________________ Class – III Lever  _____________________________________________ ___________________________________________________________

Practice Page 3

 Answer in one word. a)   A long plank or pole is used to lift a large load. _________________      b)   One example of wheel and axle. __________________      c)   A device, which help us to do a great deal of work with less effort.    ________________      d)   A pulley which is fixed firmly attached to one spot, and does not move around._________________      e)   Fulcrum is in the middle between the load and effort. _______________      f)    The wheel and axle is a first class lever.___________ Answer the following questions: a)   A pulley is what class of lever? Explain. ________________________________________________________ ________________________________________________________ ________________________________________________________     b)   What is an inclined plane? How does it help workers loading heavy objects in a truck? ________________________________________________________ ________________________________________________________ ________________________________________________________     c)   Why vehicles in plains move easier and faster compared to hilly areas? ________________________________________________________ ________________________________________________________