# PHY101

## Category:PHY101

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PHY101

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A. If a force of 40N acting in the direction due East and a force of 30N is acting in the direction due North. Then the magnitude of the resultant forces will be ___________.

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B. Which of the following does NOT refer to the terms description of stability of on an object?

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C. The physical pendulum is any real pendulum in which all the mass is taken to be concentrated at a_____.

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D. Given three vectors $vec{a} = {-}vec{i}{-}4vec{j}+2vec{k}$, $vec{b} = 3vec{i}+2vec{j}-2vec{k}$, $vec{c} = 2vec{i}{-}3vec{j}+vec{k}$, calculate $vec{a}cdot(vec{b}timesvec{c})$

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E. Instantaneous velocity is the velocity of a particle at some _____of its path.

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F.  In which of the following phenomena is surface tension important?

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G.  A cart is moving horizontally along a straight line with constant speed of 30 m/s. A projectile is fired from the moving cart in such a way that it will return to the cart after the cart has moved 80 m. At what speed (relative to the cart) and at what angle (to the horizontal) must the projectile be fired?

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H. FBQ25: A ________ is the turning effect caused by a couple.

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I. Radius of _________ is the radial distance from any given axis at which the mass of a body is concentrated without changing the moment of inertia of the body about that axis.

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J. A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true?

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K.  Tin melts at 232 under standard atmospheric pressure. Express this temperature in kelvin

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L. The fundamental interval of a thermometric scale is ______

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M. An electric kettle contains 1.5 kg of water at $$100 ^{o}$$ and powered by a 2.0 kW electric element. If the thermostat of the kettle fails to operate, approximately how long will it take for the kettle boil dry? (Take the specific latent heat of vaporization of water as $2000kJkg^{-1})$

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N. The _________ is an aggregate of point masses such as that the relative separation between any two points remains invariant

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O.  The trajectory of a projectile is ________

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P. Thermal expansion of a solid material depends on the following EXCEPT __________

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Q. According to principle of moment, if a system of coplanar forces is in equilibrium, then the algebraic ____of their moments about any point in their plane is zero

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R.  A rope suspended from a ceiling supports an object of weight W at its opposite end. Another rope tied to the first at the middle is pulled horizontally with a force of 30N. The junction P of the ropes is in equilibrium. Calculate the weight W and the tension T in the upper part of the first rope

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S.  A ball is kicked and flies from point P to Q following a parabolic path in which the highest point reached is T. The acceleration of the ball is _______

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T. The heat required to raise the temperature of the body through 1K is called _______.

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U.  The molecules of a liquid are held together by what type of forces?

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V. The specific latent heat of vapourization of a liquid is the quantity of heat in joules required to change 1kg mass of the liquid at its _______to gas at the same temperature.

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W. An object is shot from the ground at 75m/s at an angle of 45 degrees above the horizontal. How high does the object get before beginning its descent?

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X.  A string of natural length L extends to a new length L' under tensile force F. If Hooke’S law applies, the work done in stretching the spring is ------------

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Y. When a gas is allowed to expand at constant _____the process is described as isothermal.

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Z. One of these is an example of thermal radiation detector

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AA. The term that best describes the need to hold the butt of a riffle firmly against the shoulder when firing to minimise impact on the shoulder is ________

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AB. When an object is in thermal equilibrium, it is losing and gaining heat at ____ rates.

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AC.  A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take $g = 10ms^{-2}$

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AD. Calculate the root-mean-square velocity of oxygen molecules at room temperature, 25 oC. Given that molar mass of oxygen and molar gas constant are 31.9998 g/mol and 8.3143 J/mol K, respectively in meter per second.

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AE. What is the unit of impulse?

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AF. The mechanism of heat transfer from one point to another through vibration of the molecules of the medium is called -------------

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AG. Given that the specific capacity of ice is one-half that of water, does is take more thermal energy to raise the temperature of 5 g of water or 5 g of ice by $$6^{o}C?$$

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AH. A perfectly ____ body is defined as one which emits every wavelength with the maximum energy for each wavelength for the particular temperature of the body.

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AI. 3-vectors are only properly represented in a 3-dimensional _____.

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AJ. The statement "the specific latent heat of fusion of ice is $3.3times 10^{5}$J/kg" means ______

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AK.  A boy intends to move an m-kg crate across the floor by applying a constant force P newtons on it.The coeficient of friction between the floor and the crate is $mu$. Which of these is the best option for his task?

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AL. The ____ of the instantaneous centre of a moving rigid body is called centroid.

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AM. Gases occupy volume of the __________.

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AN. The frictional force in fluids is known as ___________

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AO. One of these is NOT a basic assumption of kinetic theory of ideal gases

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AP. Applied force is proportional to extension produced is a statement of ____ law.

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AQ.  Which of the following statements is not correct about reference frames?

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AR. A wire of cross-sectional area of $6times10{-5}m^{2}$ and length 50cm stretches by 0.2mm under a load of 3000N. Calculate the Young’s modulus for the wire

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AS. An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take $g = 10ms^{-2}$

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AT. The rise in the level of a liquid in a tube is h. If half the amount is poured outside, what will be the new rise in the liquid level?

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AU. Forces are called coplanar when all of them acting on body lie in one _____.

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AV. The coefficient of limiting static friction is the ratio of the ____ to the normal force.

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AW. Which of the following physical concepts best explains why passengers in fast moving cars should always fasten their seat-belts?

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AX. The _____of oscillations of a particle in simple harmonic motion is damped by resistive forces due to the surrounding medium.

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AY. A piece of stone has mass 80kg and density of 0.10 kg per meter cube. What is its volume in meter cube?

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AZ. The method of mixtures as a means of measuring the amount of heat of a substance depends of the principle of conservation of ______

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BA. How fast must a ball be rolled along the surface of a 70-cm high table so that when it rolls off the edge it will strike the floor at the same distance (70cm) from the point directly below the edge of the table?

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BB. The general motion of a rigid body is a combination of ________and rotation.

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BC.  The absolute zero temperature refers to the temperature at which _____

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BD.  An ungraduated mercury thermometer attached to a millimeter scale reads 22.8mm in ice and 242mm in steam at standard pressure. What will the millimeter read when the temperature is 20^{o} C?

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BE.  Which of the following contributes to the instability of an object?

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BF.  A 50kg boy suspends himself from a point on a rope tied horizontally between two vertical poles. The two segments of the rope are then inclined at angles 30 degrees and 60 degrees respectively to the horizontal.The tensions in the segments of the rope in newtons are ______

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BG.  The resultant of vectors $vec{A}$ and $vec{B}$ has a magnitude of 20 units.$vec{A}$ has a magnitude of 8 units, and the angle between $vec{A}$ and $vec{B}$ is $40^{o}$. Calculate the magnitude of $vec{B}$

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BH. What is common to the variation in the range and the height of a projectile?

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BI.  Which of the following is NOT true?

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BJ. On what thermometric property does the working of a thermistor depend?

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BK.  The amount of heat stored in a substance depends on all of the following EXCEPT _______

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BL.  The speed of 90 hm/hr is equal to ------------------ m/s

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BM. The main condition for the rigid body is that the distance between various particles of the body does not ____.

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BN. A mass accelerates uniformly when the resultant force acting on it

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BO.  Which of these is correct about viscosity?

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BP. _______ is that which enables a body to perform work.

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BQ.  A body hangs from a spring balance supported from the roof of an elavator. If the elavator has an upward acceleration of $3ms^{-2}$ and the balance reads 50 N, what is the true weight of the body?

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BR.  The motion of a ball rolling down a ramp is one with ________

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