J J Science Academy
Subject: Physics
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Topic: Mechanics
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SubTopic: Work & Energy
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Test Type: Full Syllabus
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Marks: 100
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Time: 180 min
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Date: _ _ / _ _ / _ _ _ _
1.
A particle is moving along a straight line such that its displacement $s$ (in meters) at time $t$ (in seconds) is given by $s = t^3 - 6t^2 + 9t$. Find the time when the velocity of the particle is zero.
(1) 1 s (2) 2 s (3) 3 s (4) Both 1 s and 3 s
2.
What is the kinetic energy of a $2 \text{ kg}$ object moving at $5 \text{ m/s}$? $$ KE = \frac{1}{2}mv^2 $$
Object in Motion Diagram
(1) 10 J (2) 20 J (3) 25 J (4) 50 J
3.
If an ideal gas undergoes an adiabatic process, which of the following statements is true?
(1) Temperature remains constant. (2) Volume remains constant. (3) No heat exchange occurs with the surroundings. (4) Pressure remains constant.
4.
Calculate the wavelength of a photon with energy $E = 2.0 \text{ eV}$. (Given: $h = 4.135 \times 10^{-15} \text{ eV}\cdot\text{s}$, $c = 3 \times 10^8 \text{ m/s}$) $$ \lambda = \frac{hc}{E} $$
(1) $620 \text{ nm}$ (2) $410 \text{ nm}$ (3) $310 \text{ nm}$ (4) $1240 \text{ nm}$