The zero error helps in correcting the misreading you get from any instrument. It helps in maintaining the sensitivity of the instruments.
Speedometer
They are Force meter or Force gauge that use to measure the force. The meter may use spring of known elasticity or electro-magnet to balance and measure out the force.
You use kilo grams in measuring weight if you live in Austarlia. In America they use pounds and in the U.K they use stone
Because it will stretch and be incorrect.If we use an elastic measuring tape to measuredistance, it may stretch while measuring the distance,thus the measurement will be incorrect.
measuring tape
Zero error is necessary for measuring instruments for measuring accurate results because it helps to check that the instrument which we are using is whether correct or wrong
measuring jug! kettle
Speedometer
a protractor
a protractor
There are many instruments for measuring speed but I am not aware of any for measuring velocity.
A thermometer
A measuring flask.
It is necessary because measuring tools help you measure the length of an object accurately.
a instrument used for measuring blood pressure
Meter stick
A measuring cylinder