Q.1: Energy in an object due to its position and its motion is called _________ energy.
Q.2: The ability to do work is known as ___________.
Q.3: We use _______ energy to cook food.
Q.4: In _________-class levers, the effort is in between the fulcrum and load.
Q.5: The _______ helps the rope from slipping off the disc.
Q.6: The energy of an object due to its motion is known as _________.
Q.7: Force can move a ________ object.
Q.8: A _________ is an inclined plane wound around a rod.
Q.9: Which of the following is an example of inclined plane ?
a) steering wheel
Q.10: The machines that contain several simple machines for their working are known as ____________ machines.
Q.11: ________ energy is produced when an object starts vibrating.
Q.12: The electricity generated from the flow of water is known as ___________.
a) hydrogen energy
c) hybrid electricity
Q.13: Wind energy is generated using _________.
a) ceiling fans
b) hand fans
Q.14: __________ is a machine which does a variety of tasks on command or according to instructions programmed in advance.
Q.15: Which of the following is a second class lever ?
b) ice tongs
Q.16: ___________ is said to be done only when the applied force causes change in the position of the object in the direction of applied force.
Q.17: When things are rubbed with each other, they become charged and a force is produced known as __________ force.
Q.18: The object on which work is to be performed is called __________.
Q.19: A ________________ pulley has movable axle.
a) Single fixed
b) Single movable
Q.20: ______________ energy is produced by bulbs, CFLs, candles, etc.