Question : "Impulse" can be defined as:
Option 1: the force acting on a body for a very long time.
Option 2: the work done by a body for a short time.
Option 3: the force acting on a body for a short time.
Option 4: the temperature acting on a body for a short time.
Correct Answer: the force acting on a body for a short time.
Solution : The correct option is the force acting on a body for a short time.
Impulse is the product of force and the time over which it acts on a body. Mathematically, it is expressed as impulse = force × time. It signifies the change in momentum, providing insights into how force influences an object's motion, particularly during brief interactions.
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Question : When a body is immersed in a liquid, the force acting on it is:
Option 1: Upthrust
Option 2: Weight
Option 3: Mass
Option 4: Both 1 and 2
Question : If a body moves with a constant speed in a circle:
Option 1: no work is done on it
Option 2: no force acts on it
Option 3: no acceleration is produced
Option 4: its velocity remains constant
Question : To do a certain work, B would take time thrice as long as A and C together and C twice as long as A and B together. The three men together complete the work in 10 days. The time taken by A to complete the work separately is:
Option 1: 22 days
Option 2: 24 days
Option 3: 30 days
Option 4: 20 days
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