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1. A rod of length l and radius r is joined to a rod of length l/2 and radius r/2 of same material. The free end of small rod is fixed to a rigid base and the free end of larger rod is given a twist of A degrees. The twist angle at the joint will be (ans-8A/9)
2.A uniform wire of length l and radius r is twisted by angle A. if modulus of rigidity of wire is B then elastic potential energy stored in wire is?(ans-pie*B*r^4*A^2/4l)
3.Two wires A and B are of same length and of same material having radii r1 and r2 respectively. Their one end is fixed with a rigid support and at the other end equal twisting couple is applied. Then ratio of the angle of twist at the end of A and the angle of twist at the end B will be? ans-r1^2/r2^2
An aluminum wire has the same resistanceas a copper wire of the same length. Find the ratio of the aluminumwire's diameter to the copper wire's diameter.
determine the coefficient of static friction between a motorcycle tires and the pavement as he leans to the side in
A parallel-plate capacitor is formed of two 10 cm x10 cm plates spaced 1.0 cm apart, What is the slowest speed the electron can have if it is to reach the negative plate
An electron of kinetic energy 1.56 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 21.8 cm. determine the circling frequency
A 0.2 kilogram plastic cart and a 20 kilogram lead cart can both roll without friction on a horizontal surface. Find which cart has the greater momentum
ulie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 17 m/s at an angle 33 degrees; What is the speed of the ball when it leaves Sarah's hand
A spherical weather balloon is filled with hydrogen until its radius is 3.00 m. Its total mass including the instruments it carries is 15.0 kg. Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3. N
A ray of light strikes a plane mirror at a 45° angle of incidence. The mirror is then rotated with α =34° into the position shown in red in the drawing, while the incident ray is kept fixed. During what angle? Does the reflected ray rotate?
A 2kg lunchbox is sent sliding over a frictionless surface, in positive direction of an x axis along the surface. Start at time t = 0, steady wind pushes on the lunchbox in the negative direction of the x axis.
A quantity of ideal gas at 10.0°C and 100 kPa occupies a volume of 1.20 m3. how much volume does the gas occupy
A 2-kg collar which can slide on a frictionless vertical rod is acted upon by a force P which varies in magnitude as shown. Knowing that the collar is initially at rest, determine
A block with a mass of 1.45kg is pushed up an incline plane with a force in direction of the incline. How much work is necessary to push the block up the incline to a height of 2.08m
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