The kinetic energy of an object of mass
The kinetic energy of an object of mass m moving with a velocity v is 25 J. What will be its kinetic energy when its velocity is increased three times (3v)?
वेग v से गतिमान m द्रव्यमान की किसी वस्तु की गतिज ऊर्जा 25 J है। जब इसका वेग बढ़ाकर तीन गुना (3v) कर दिया जाए तो इसकी गितज ऊजा कितनी होगी?
Detailed Solution & Logic
225 J
📘 Explanation
Given, initial kinetic energy
$KE = \dfrac{1}{2}mv^2 $
Initial kinetic energy (प्रारम्भिक गतिज ऊर्जा) =25 J
Initial velocity (वेग) =v
When velocity becomes (अब नया वेग) - $3v$,
New kinetic energy - (नई गतिज ऊर्जा):
$KE' = \dfrac{1}{2}m(3v)^2$
$KE' = \dfrac{1}{2}m \times 9v^2$
$KE' = 9 \left(\dfrac{1}{2}mv^2\right)$
Since,
$\dfrac{1}{2}mv^2 = 25,J$
Therefore,
$KE' = 9 \times 25$
$KE' = 225,J$
Kinetic energy becomes 9 times when velocity becomes 3 times.
वेग तीन गुना होने पर गतिज ऊर्जा 9 गुना हो जाती है।
⭐ Extra Facts / अतिरिक्त तथ्य
🔹 English
-
Kinetic energy depends on the square of velocity.
-
Doubling velocity makes KE 4 times; tripling makes it 9 times.
🔹 Hindi
-
गतिज ऊर्जा वेग के वर्ग (square) पर निर्भर करती है।
-
वेग दोगुना ⇒ ऊर्जा 4 गुना, वेग तीन गुना ⇒ ऊर्जा 9 गुना।
Similar Practice Questions
What is the function of the secretions from the prostate gland and seminal vesicles in the male reproductive system?
What is the function of the secretions from the prostate gland and seminal vesicles in...
What does a lens with a power of 1 dioptre indicate?
What does a lens with a power of 1 dioptre indicate? 1 डायोप्टर शक्ति वाला...
If a conductor has a potential
If a conductor has a potential difference of 1 volt across its ends and a...
If the mass of a body is increased, the inertia:
If the mass of a body is increased, the inertia: यदि किसी पिंड का द्रव्यमान...
Although a colloid appears homogeneous, it is actually a __________.
Although a colloid appears homogeneous, it is actually a __________. यद्यपि कोलॉइड समांगी (एक जैसा)...
A patient with reduced bile production will face difficulty in the absorption of ______.
A patient with reduced bile production will face difficulty in the absorption of ______. पित्त...
Which of the following cell structures
Which of the following cell structures helps amoeba to acquire its food material? निम्नलिखित में...