MHT CET · Physics · Motion In Two Dimensions
A particle is moving in a circle with uniform speed ' \(v\) '. In moving from a point to another diametrically opposite point
- A the momentum changes by \(\mathrm{mv}\)
- B the momentum changes by \(2 \mathrm{mv}\)
- C the kinetic energy changes by \(\frac{1}{2} \mathrm{mv}^2\)
- D the kinetic energy changes by \(\mathrm{mv}^2\)
Answer & Solution
Correct Answer
(B) the momentum changes by \(2 \mathrm{mv}\)
Step-by-step Solution
Detailed explanation
At both points, the momentum will be mv, but will be in opposite directions.
\(\begin{array}{ll}\therefore & \Delta \mathrm{P}=\mathrm{mv}-(-\mathrm{mv}) \\\therefore & \Delta \mathrm{P}=2 \mathrm{mv}
\end{array}\)
The momentum changes by \(2 \mathrm{mv}\).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A diatomic ideal gas is used in Carnot engine as a working substance. If during the adiabatic expansion part of the cycle, the volume of the gas increases from V to 32 V , the efficiency of the engine isMHT CET 2024 Medium
- When the observer moves towards the stationary source with velocity \(V_1\), the apparent frequency of the emitted note is \(F_1\). When the observer moves away from the source with velocity \(V_1\), the apparent frequency is \(F_2\). If \(V\) is the velocity of sound in air and \(\frac{F_1}{F_2}=2\) then \(\frac{V}{V_1}=\) ?MHT CET 2016 Medium
- Two sound waves travelling in the same direction have displacement
\(\begin{aligned}
& y_1=a \sin (0 \cdot 2 \pi x-50 \pi t) \text { and } \\
& y_2=a \sin (0 \cdot 15 \pi x-46 \pi t)
\end{aligned}\)
How many times, a listener can hear sound of maximum intensity in one second?MHT CET 2025 Medium - 1000 small water drops of equal size combine to form a big drop. The ratio of final surface energy to the total initial surface energy isMHT CET 2023 Medium
- What is the susceptibility of a medium if its relative permeability is \(0.85 ?\)MHT CET 2021 Easy
- What should be the length of a closed pipe to produce resonance with sound wave
of wavelength \(62 \mathrm{~cm}\), in fundamental mode?
[Neglect end correction]MHT CET 2020 Easy
More PYQs from MHT CET
- A \(100 \mathrm{mH}\) coil carries a current of \(1 \mathrm{~A}\). Energy stored in the form of magnetic field isMHT CET 2023 Medium
- The order of the differential equation, whose general solution is given by
\(y=\left(\mathrm{c}_1+\mathrm{c}_2\right) \cos \left(x+\mathrm{c}_3\right)-\mathrm{c}_4 \mathrm{e}^{x+\mathrm{c}^5}\)
where \(c_1, c_2, c_3, c_4\) and \(c_5\) are arbitrary constant, isMHT CET 2024 Easy - A lot of 100 bulbs contains 10 defective bulbs. Five bulbs selected at random from the lot and sent to retail store, then the probability that the store will receive at most one defective bulb isMHT CET 2021 Easy
- Systolic pressure in adult human isMHT CET 2004 Hard
- If radius of the solid sphere is doubled by keeping its mass constant, the ratio of their moment of inertia about any of its diameter isMHT CET 2019 Easy
- A random variable \(X\) has the following. -probability distribution
Then \(\mathrm{P}(\mathrm{X}\gt2)\) is equal toMHT CET 2024 Medium