Question

In a uniform circular motion the quantity which is variable is (1) Speed (2) Kinetic energy (3) Momentum (4) All of these

Answer 1

Answer:

3

Explanation:

rest all are scalars i.e. their change in direction is of no importance

while momentum include velocity a vector whose direction change is marked as change in quantity

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Answer 2

The momentum is variable in a uniform circular motion. (Option 3)

• Because linear momentum equals mass multiplied by velocity, and velocity vector varies, the linear momentum does not remain constant.
• In a uniform circular motion, mass, speed, and kinetic energy are all constant. Because speed is a scalar variable, it remains constant in a uniform motion.
• On the other hand, the velocity is not constant. The kinetic energy remains constant since there is no tangential acceleration. The centripetal acceleration is the only factor that matters.
• Momentum is a directionally dependent vector quantity. Because the direction of a uniform circular motion continually varies, momentum may be changed.
• As a result, momentum is changeable, and option 3 is the right answer.