TS EAMCET · Physics · Laws of Motion
A bullet of mass \(m\) enters a wooden block of length \(L\) at a speed \(v_1\) and emerges out of block with a speed \(v_2\). If \(F\) is the average force which impeded its motion through the wooden block, then (Assume uniform deceleration inside the block)
- A \(F=\frac{m}{2 L}\left(v_2^2-v_1^2\right)\)
- B \(F=\frac{m}{4 L}\left(v_2^2+v_1^2\right)\)
- C \(F=2 \frac{m}{L}\left(v_2-v_1\right)^2\)
- D \(F=\frac{m}{2 L}\left(v_2+v_1\right)^2\)
Answer & Solution
Correct Answer
(A) \(F=\frac{m}{2 L}\left(v_2^2-v_1^2\right)\)
Step-by-step Solution
Detailed explanation
Given that, mass of bullet \(=m\) Average resistance force \(=F\) i.e. retardation, \(a=F / m\) Using equation of kinematics,…
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 non-conducting body floats in a liquid at \(20^{\circ} \mathrm{C}\) with \(\frac{2}{3}\) of its volume immersed in the liquid. When liquid temperature is increased to \(100^{\circ} \mathrm{C}, \frac{3}{4}\) of body's volume is immersed in the liquid. Then the coefficient of real expansion of the liquid is (neglecting the expansion of container of the liquid)TS EAMCET 2011 Medium
- One mole of nitrogen gas being initially at a temperature of \(T_0=300 \mathrm{~K}\) is adiabatically compressed to increase its pressure 10 times. The final gas temperature after compression is (Assume, nitrogen gas molecules as rigid diatomic and \(100^{1 / 7}=1.9\) )TS EAMCET 2019 Easy
- An \(n-p-n\) transistor power amplifier in \(C-E\) configuration givesTS EAMCET 2005 Easy
- A man of mass 60 kg is standing in a lift moving up with a retardation of \(2.8 \mathrm{~ms}^{-2}\). The apparent weight of the man isTS EAMCET 2025 Medium
- If the radiation emitted by a perfect radiator has maximum intensity at a wavelength of \(2900 Å\), the intensity of radiation emitted by it is (Stefan-Boltzmann's constant \(=5.67 \times 10^{-8} \mathrm{Wm}^{-2} \mathrm{~K}^{-4}\) and Wein's constant \(=2.9 \times 10^{-3} \mathrm{mK}\) )TS EAMCET 2025 Medium
- A body of mass \(2 \mathrm{~kg}\) starts from rest and moves with uniform acceleration. It acquires a velocity \(20 \mathrm{~ms}^{-1}\) in \(4 \mathrm{~s}\). The power exerted on the body in \(2 \mathrm{~s}\) in watts isTS EAMCET 2002 Easy
More PYQs from TS EAMCET
- The total current supplied to the following circuit by the battery is
TS EAMCET 2020 Medium - Two ammeters and are connected as shown in the given figure. By neglecting the internal resistance of the ammeters, the reading in the meter is
TS EAMCET 2021 Easy - A car moving towards a cliff emits sound of frequency ' \(n\) '. If the difference in frequencies of the horn and its echo heard by the driver of the car is \(10 \%\) of ' \(n\) ', then the speed of the car is nearly (Speed of sound in air is \(336 \mathrm{~ms}^{-1}\) )TS EAMCET 2025 Medium
- Heat loss takes place from a body maintained at a temperature of \(400^{\circ} \mathrm{C}\) to the surrounding air at \(30^{\circ} \mathrm{C}\) by convection and to the surrounding surfaces at \(30^{\circ} \mathrm{C}\) by radiation. The Newton's cooling coefficient is \(20 \mathrm{~W} / \mathrm{m}^2 \mathrm{~K}\) and the Stefan-Boltzmann constant is \(5.67 \times 10^{-8}\) \(\mathrm{W} / \mathrm{m}^2 \mathrm{~K}^4\). If the rate of heat loss by convection is equal to the rate of heat loss by radiation, the emissivity of the body surface isTS EAMCET 2018 Medium
- Identify the correct statement among the following.TS EAMCET 2019 Easy
- A particle of mass ' \(\mathrm{m}\) ' is moving along a line \(\mathrm{y}=\mathrm{x}+\mathrm{a}\) with a constant velocity ' \(v\) '. The angular momentum of the particle about the origin isTS EAMCET 2023 Easy