Constant speed refers to the uniform motion of an object traveling the same distance over equal intervals of time. In this state, the velocity remains unchanged, meaning there is no acceleration. Constant speed is crucial in various applications, ensuring predictable movement in transportation and mechanical systems.
Chapter 5 of Class 11 Physics focuses on work energy and power. It explains the concepts of work done by a force energy transformations and the principle of conservation of energy. The chapter also covers different forms of energy such as kinetic and potential energy and introduces power as the rate of doing work.
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When a body is moving in a circular path with constant speed, we have to look into the consequences of circular motion.
1. Work done will be zero:
– True. Since the force (centripetal force) is always perpendicular to the direction of motion, no work is done on the body.
2. Acceleration will be zero:
– False. The velocity has a constant speed but is changing direction all the time, and hence there is a centripetal acceleration directed toward the center of the circular path.
3. No force acts on the body:
– False. A net force (centripetal force) is necessary to keep the body moving in a circular path and is directed towards the center.
4. Its velocity remains constant:
– False. True, the velocity magnitude is unchanged, but the velocity is a vector: its direction must change; it is not a constant.
Final Answer:
Work done will be zero.
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