Question

Name the device used for measuring:(1) mass (2) weight.

Answer 1

A mechanical scale or balance is used to describe a weighing device that is used to measure the mass, force exertion, tension and resistance of an object without the need of a power supply. Types of mechanical scale include spring scales, hanging scales, triple beam balances and force gauges.

Answer 2

Answer:

(i)Beam balance is used to measure mass of the body.

(ii)Spring balance is ued to measure the weight of the body.

Explanation:

Beam balance

• It is used to measure the mass of the body by measuring the force F exterted by mass  on the beam balance.
• Beam balance works on the principle of moments and compare force.
• There is a wooden base with three lavelling screws out which two are adjustable and a pans are attacjed through stirrups.
• When two differents mass are placed in a pan then it compares the the weight.

Spring balance

• It is used to measure the weight of the body due to the gravity against the force on spring.
• Spring balance works on the principle of Hooke's law which is F=−kx
• When a weight is hang to a spring it stretches the spring and the extension of spring is directly proportional to the weight of an object.