Q11:-Express the velocity and the acceleration of a moving point p(r, 8,z) along the curve r = a(1+ sin t), e = 1-e-t and z = cos t in the term of Ur, Ug and k. Hint: - the position vector in cylindrical coordinates is R =rU, + zk.
Q: torque of 10Nm is applied to a flywheel of mass 1kg and radius of gyration 50cm. What is the resulti...
A: Given: Torque,τ=10 Nm Mass, m=10 kg Gyration, k=0.5 m
Q: Two uniform circular disks of moment of inertia I = 3.0 × 10-3 kg · m2 about its center of mass and ...
A: Given: w=6NI=3.0×10w=6-3 kg-mrR=0.25mg=9.8 m/sr
Q: A 4.0 kg object is raised 7 meters above the ground (on the earth). How high would the object have ...
A:
Q: The speed of driving a car safely depends on ___________ a) Capacity of the car b) Fuel in the tank ...
A: D
Q: A bullet of mass 0.04kg moving with a speed of 90m/s enters a wooden block and is stopped after a di...
A: m = 0.04kg, u = 90m/s v = 0, s = 60cm = 0.60m v2-u2 = 2as a = -6750m/s2 Therefore, retardation force...
Q: In the magnetic circuit in the question, find the required current i (A) for the magnetic flux densi...
A: The magnetic field in the middle arm is given by:
Q: A truck and a car are moving with equal velocity. On applying brakes, both will stop after a certain...
A: Being lighter than a truck, the car has less kinetic energy. On applying brakes with the same force,...
Q: circular tube is subjected to torsion by torques T applied at the ends. The bar is 0.75 m long and t...
A:
Q: Why are the glasses of building milky? a) Because of unwanted deposits b) Because it becomes old c) ...
A: D option
Q: A bullet fired from a gun can pierce a target due to its ___________ a) Mechanical energy b) Heat en...
A: Option c
Q: A pendulum with L = 7.0 m suspends a 5.0 kg ball. The ball is pulled aside to angle θ0=30° and rele...
A: Wgravity=mgL-Lcosθ=mgL1-cosθ
Q: The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is? a) 9...
A: B option
Q: Thank you!
A:
Q: The motion of a rocket is based on the principle of conservation of ___________ a) Linear momentum b...
A: Option a
Q: please help
A: Concept used: Position operator is composed of creation and annihilation operator. Orthogonality and...
Q: B) Find the equation of the plane containing points A, B, and C using a vector approach (from chapte...
A: (B) Given: The points in space are A=4,2,-3, B=-2,5,1 and C=5,1,-2. Introduction: A plane is a flat,...
Q: When a man jumps out of a boat to the shore, the boat slightly moves away from the shore. a) True b)...
A: True
Q: The kinetic energy is water is used to run turbines. a) True b) False
A: Option b
Q: A gardener pushes a lawn roller through a distance of 20m. If he applies a force of 20kg weight in a...
A: Option b
Q: A train has to negotiate a curve of radius 400m. By how much should the putter rail be raised with r...
A: Radius of the curve, R=400m Speed limit of the train, v= 48 Km/hr=13.33 m/s We assume that there is...
Q: While firing a bullet, the gun should be ___________ a) Held away from the shoulder b) Held tight to...
A: B
Q: A bullet is fired from the rifle. If the rifle recoils freely, then the kinetic energy of the rifle ...
A: By conservation of momentum, MV = mv or V = mv/M Kinetic energy of the rifle is Kr = 1/2MV2 = 1/2M(m...
Q: The kinetic energy acquires by a mass m in travelling distance d, starting from rest, under the acti...
A: Option b
Q: Consider a car moving along a straight horizontal road with a speed of 72km/h. If the coefficient of...
A: Option b
Q: in number 27 and 28, count the number of vertices, edges and faces in the graph, and then verify the...
A: Given: The graph is as follows: Introduction: If there is a way to get from one vertex of a graph t...
Q: A gun fires a bullet of mass 50g with a velocity of 30m/s. Because of this, the gun is pushed back w...
A: Given: The mass of bullet is m1=50 g. The initial velocity of bullet is u=30 m/s. The final velocit...
Q: A force can do no work on a body, yet the body can move under accelerated motion. a) True b) False
A: True
Q: B. A/ How m of work? B/ How mu
A: Heat Engine A heat engine is a device that is used to convert heat energy into mechanical energy. A...
Q: A gun fires a bullet of mass 50g with a velocity of 30m/s. Because of this, the gun is pushed back w...
A: C
Q: Statement 1: Linear momentum of a system of particles is zero. Statement 2: Kinetic energy of a syst...
A:
Q: Bernoulli’s Principle A small circular hole 5.00 mm in diameter is cut in the side of a large water ...
A: Given data: The diameter of the hole is d=5.00 mm. The height of the hole is y1=11.0 m. The gauge p...
Q: Moment of inertia can be regarded as the measure of the rotational inertia of the body. a) True b) F...
A: Option a
Q: When force and displacement are in the same direction, the kinetic energy of the body ___________ a)...
A: Increases
Q: In a bicycle the radius of rear wheel is twice the radius of the front wheel. If rf and rr are the r...
A: Option c
Q: An aeroplane flying horizontally with a speed of 360km/h releases a bomb at a height of 490m from th...
A: Option c
Q: iron has a bcc structure with atomic radius 0.123 å. find the lattice constant. a) b) 4.587 c) 2.3...
A: r = 0.123 Å The lattice constant for BCC = 4r/√3 The lattice constant = 0.2840 Å.
Q: Lightning can be studied with a Van de Graaff generator, which consists of a spherical dome on which...
A:
Q: The position of a particle according to the appropriate coordinate set can be vectorially specified ...
A:
Q: Compare the total energy radiated by your body in one day (expressed in kilocalories) to the energy ...
A: The total power radiated by our body is P=1050 W. The energy we would lose in one day will be: E=105...
Q: A scooterist moving with a speed of 36km/h sees a child standing in the middle of the road. He appli...
A: u = 36km/h = 10m/s, v = 0, t = 5sa = (v-u)/t = (0-10)/5 = -2m/s2Retardation = 2m/s2Average retarding...
Q: Find the magnitude and direction of the resultant of the two forces shown. (Note: with no length geo...
A: Note that in its vertical plane, F1’s vertical component (3) is its z-component (F1z) and its horiz...
Q: Two particles A and B, initially at rest, move towards each other under mutual force of attraction. ...
A: Option
Q: A position dependent force, F = 7-2x+3x2-N acts on a small body of mass 2kg and displaces it from x ...
A: Option
Q: A solid sphere of radius R is placed on smooth horizontal surface. A horizontal force F is applied a...
A: D
Q: According to the figure, since r=-0,14, k=4,61, E 16,91 (@ medium boundary) and reflected electric f...
A: The reflection coefficient Γ is given by, Γ=ErEi (1) Given that Γ=-0.14 and |Ei|=16.91 pluggi...
Q: What is the possible number of different types of lattices (3D)? a) 4 b) 8 c) 14 d) 17
A: C
Q: Consider a car moving along a straight horizontal road with a speed of 72km/h. If the coefficient of...
A: Given, Initial velocity of car, u = 72 km/h = 20 m/s Final velocity of car, v = 0 static friction be...
Q: A mass m is moving with a constant velocity along a line parallel to the x-axis, away from the origi...
A: A
Q: Two spheres of masses m and M are in air and the gravitational force between them is F. The space ar...
A: This is a question related to the gravitational force. According to Newton's Universal Law of Gravit...
Q: Conservation of linear momentum is a combination of ___________ a) Newton’s second law and third law...
A: Option
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