Free fall
Free fall is a Science & Technology concept from the MPSC syllabus, tested in 3 past MPSC questions (2016, 2019, 2024). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.
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एक वस्तू निर्वात पोकळीतून गुरुत्वाकर्षण क्रिये अंतर्गत मुक्तपणे खाली पडत आहे. अश्या प्रकारच्या क्रियेमध्ये खालीलपैकी कोणत्या बाबी स्थिर राहतील ? A body is falling freely under the action of gravity alone in vacuum. Which of the following quantities remains constant during the fall ?
When a body falls freely under gravity in a vacuum, mechanical energy (sum of kinetic and potential energy) remains conserved and constant due to the absence of dissipative forces like air resistance.
उपग्रहमध्ये, अंतराळवीर हा वजनरहित अवस्था अनुभवतो कारण ______
(a)उपग्रहाच्या आतील पृष्ठभागाकडून अंतराळवीरार प्रयुक्त होणारे बल हे शून्य असते.
(b)अंतराळवीर व उपग्रहाचा पृष्ठभाग एकमेकाकडे आकर्षितले जातात.
(c)अंतराळवीर हा कोणत्याही गुरुत्वीय बलाने आकर्षितला जात नाही.
(d)वरीलपैकी कोणतेही नाही
Inside an orbiting satellite, an astronaut experiences weightlessness because both the satellite and the astronaut are in free fall towards the Earth under gravity, making the normal reaction force from the floor zero, leading to option 4 (none of the above statements are correct in the way standard physics options are framed here as 'फक्त ड').
वर फेकलेल्या कणाची गती शून्य असते परंतु त्याचे त्वरण किती असते ? / A particle thrown up has zero velocity but how much will be the acceleration ?
At the highest point of its trajectory, a particle thrown upwards has zero instantaneous velocity, but the acceleration acting on it is still the constant acceleration due to gravity (g downwards).