Answer :
Final answer:
A spring balance is used to measure the amount of force exerted on an object. It operates based on Hooke's Law, comparing the force exerted by an object's mass with the stretch it produces in the spring.(option c)
Explanation:
The instrument used to measure the amount of force exerted on an object is the Spring balance. A spring balance operates on the principle of Hooke's Law, which states that the force exerted by a spring is directly proportional to the amount it is stretched.
Hence, the weight of an object (which is the force exerted by its mass due to gravity) can be measured by comparing it with the amount of stretch it produces in the spring. The other options, Platform balance, Double beam balance, and Triple beam balance, are types of balances that measure mass rather than force. These rely on the principle of equilibrium and counterweights, not on the principles associated with force like the spring balance.
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