This device is found in the pencil sharpener in your class.It has a small cylinder and a handle.
What is a winch?
100
The energy possessed by an object due to its state of motion. For e.g. a moving car.
What is kinetic energy?
100
Pressure= Force/ Area
What is the formula for pressure?
100
Pressure exerted on a contained fluid is transmitted undiminshed in all directions throughout the fluid and perpendicular to the walls of the container.
What is Pascal's law?
200
The fulcrum is in the middle of the effort and the load.
What is class 1 lever ?
200
The main gear that causes other gears to move and is turned by a motor or a handle.
What is a driving gear?
200
The energy possessed by an object due to its position.
What is potential energy?
200
A push or pull that causes a change in the motion of an object.
What is the definition of force?
200
A jackhammer
What is the name of a pneumatic machine used in the mining of coal?
300
Hockey stick
What is an example of class 3 lever?
300
Multiplying gears
What is the type of gears if driving gear has larger no. of teeth as compared to the driven gear?
300
By lubricating the parts of a bicycle and by inflating the tyres.
What are the two methods by which you can increase the efficiency of your bicycle?
300
To increase the surface area and to decrease the pressure in case of falls.
What is the advantage of wearing protective gear for players?
300
A Backhoe
What is the name of the machine which used hydraulics to move its arms?
400
Force X Distance
What is formula for work?
400
Reducing gears
What is the type of gears if the driving gear has smaller no. of teeth as compared to the driving gear?
400
Rosin
What is used by the baseball players and gymnasts to improve their grip?
400
Hydrayulic lift
Which meachnical system is used in to lift the car in a service station ?
400
Red, green and yellow systems
What are the three hydraulic systems used in the aeroplanes?
500
The work the machine does on the load.
What is output work?
500
No. of driver gear teeth/ No. of driven gear teeth
What is the speed ratio of gears?
500
Work output / Work input X 100
What is efficiency of a machine?
500
Area of the load plunger/ Area of the effort plunger
What is the formula for the mechanical advantage of a hydraulic lift?
500
Circulatory system
What is an example of hydraulic system in your body?