When particle revolves with uniform speed on a circular path a)no force act on it b)no excellaration acts on it c)no work is done on it d)its velocity is constant answer this mcq
To answer this multiple-choice question, we need to understand the concept of a particle moving with uniform speed on a circular path. Let's go through each option one by one.
a) "No force acts on it": This statement is not correct. According to Newton's first law of motion, an object moving in a circular path experiences a force called centripetal force, which pulls it towards the center of the circle.
b) "No acceleration acts on it": This statement is also incorrect. Even though the speed may be constant, the direction of the particle's velocity is changing continuously as it moves along the circular path. Since acceleration is the rate of change of velocity, there must be an acceleration acting on the particle to constantly change its direction.
c) "No work is done on it": This statement is true. Work is defined as the product of force and displacement in the direction of the force. In the case of a particle moving in a circular path with a constant speed, the force (centripetal force) is always perpendicular to the displacement. Therefore, no work is done on the particle.
d) "Its velocity is constant": This statement is not correct. The magnitude of the velocity remains constant, but the direction is continuously changing due to the particle's motion on a circular path. Hence, the velocity is not constant.
Based on the explanations above, the correct answer would be: c) no work is done on it.
The correct answer to the multiple choice question is:
b) no acceleration acts on it
When a particle revolves with uniform speed on a circular path, it experiences a centripetal acceleration towards the center of the circle. This centripetal acceleration keeps the particle moving in a circular path, but it does not change the speed of the particle. Therefore, the particle's velocity remains constant, and there is no acceleration acting on it.