AP EAMCET · PHYSICS · Work Power Energy
A toy car of mass \(100 \mathrm{~g}\) is moving with velocity of \((\hat{i}+2 \hat{j}-3 \hat{k}) m\), then the kinetic energy of the car is
- A \(7 \mathrm{~J}\)
- B \(70 \mathrm{~J}\)
- C \(0.7 \mathrm{~J}\)
- D \(0.07 \mathrm{~J}\)
Answer & Solution
Correct Answer
(C) \(0.7 \mathrm{~J}\)
Step-by-step Solution
Detailed explanation
Mars, \(m=100 \mathrm{~g}=0.1 \mathrm{~kg}\) velocity, \(\vec{v}=\hat{i}+2 \hat{j}-3 \hat{k}\) Magnitude of velocity, \(|v|=\sqrt{(\hat{i})^2+(2 \hat{j})^2+(-3 \hat{k})^2}=\sqrt{14}\) Kinetic energy is given as,…
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
- The maximum velocity of a particle performing simple harmonic motion is \(6.28 \mathrm{~cm} \mathrm{~s}^{-1}\). If the length of its path is \(8 \mathrm{~cm}\), then what is its period?AP EAMCET 2020 Easy
- A series LCR circuit is shown in the figure. Where the inductance of 10 H , capacitance \(40 \mu \mathrm{~F}\) and resistance 60 \(\Omega\) are connected to a variable frequency 240 V source. The current at resonating frequency is
AP EAMCET 2024 Easy - An object requires \(500 \mathrm{~N}\) force to be pulled up on a \(30^{\circ}\) frictionless smooth inclined plane at a constant speed. The weight of the object isAP EAMCET 2022 Medium
- Three rods of same dimensions have thermal conductivities and . They are arranged as shown in the figure below. Then in the steady state the temperature of the junction is
AP EAMCET 2018 Easy - The principle quantum number ' \(n\) ' corresponding to the exited state of \(\mathrm{He}^{+}\)ion, if on transition to the ground state two photons in succession with wavelength \(1026 \mathrm{~A}^{\circ}\) and \(304 \mathrm{~A}^{\circ}\) are emitted ( \(\mathrm{R}=1.097 \times 10^7 \mathrm{~m}^{-1}\) )AP EAMCET 2024 Medium
- The ratio of de-Broglie wavelength of molecules of hydrogen and helium which are at temperatures \(27^{\circ} \mathrm{C}\) and \(127^{\circ} \mathrm{C}\) respectively isAP EAMCET 2017 Easy
More PYQs from AP EAMCET
- Observe the following sets
\begin{array}{|l|l|l|}\hline & {|c|}{ Order } & {c|}{ Property } \\\hline i. & \mathrm{NH}_3>\mathrm{H}_2 \mathrm{O}>\mathrm{SO}_2 & Bond angle \\\hline ii. & \mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3>\mathrm{H}_2 \mathrm{~S} & Dipole moment \\\hline iii. & \mathrm{N}_2>\mathrm{O}_2>\mathrm{H}_2 & Bond enthalpy \\\hline iv. & \mathrm{NO}^{+}>\mathrm{O}_2>\mathrm{O}_2^{2-} & Bond order \\\hline\end{array}
Which of the above sets are correctly matched?AP EAMCET 2024 Medium - If the middle term in the expansion of \((1+x)^{2 n}\) is the greatest term, then \(x\) lies in the intervalAP EAMCET 2016 Hard
- Which condition among the following holds true at the state of half-completion for the reaction \(A \rightleftharpoons B\) ?AP EAMCET 2021 Easy
- A man is known to speak truth 7 out of 10 times. After throwing a die with 100 faces marked 1,2,3,.., 100 on it's faces, the man reports that he got a prime number on the die. What is the probability that it is actually a prime?AP EAMCET 2021 Medium
- If the vertices of the triangles are and if and respectively denote its orthocenter, centroid, circumcenter and incenter, thenAP EAMCET 2021 Hard
- Let \(P\left(x_1, y_1, z_1\right)\) be the foot of perpendicular drawn from the point \(Q(2,-2,1)\) to the plane \(x-2 y+z=1\). If \(d\) is the perpendicular from the point \(Q\) to the plane and \(l=x_1+y_1+z_1\), then \(l+3 d^2\) isAP EAMCET 2024 Easy