Related InterviewSolutions

• A train starting from rest travels the first part of its journey with constant acceleration a, secondpart with constant velocity v nd third part with constant retardation a, being brought to rest.the average speed for the whole journey is7v8. The train travels with constant velocity for...of the total time -A. `3/4`B. `7/8`C. `5/6`D. `9/7`
• If retardation produced by air resistances to projectile is one-tenth of acceleration due to gravity, the time to reach maximum height approximately-A. increase by 9%B. decrease by 9%C. increase by 11%D. decrease by 11%
• A uniform thin rod of mass m and length L is standing vertically along the y-axis on a smooth horizontal surface, with its lower end at the origin (0,0). A slight disturbane at t = 0 causes the lower end t slip on the smooth surface along the positive x-axis, and the rod starts falling. (i) What is the path followed by the centr of mass of the rod during its fall? (ii) Find the equaiton to the trajectory of a point on the rod shape of the path of this point?A. Straight lineB. parabolaC. EllipseD. Circle
• The force required to row a boat over the sea is proportional to the speed of the boat. It is found that it takes 24 h.p. to row a certain boat at a speed of 8km/hr, the horse power required when speed is doubled -A. 12h.pB. 6h.pC. 48h.pD. 96h.p.
• A heavy particle hanging from a fixed point by a light inextensible string of length l is projected horizontally with speed (gl) . Then the speed of the particle and the inclination of the string to the vertical at the instant of the motion when the tension in the string equal the weight of the particle-A. `sqrt((31)/g),cos^(-1)(3//2)`B. `sqrt((1g)/3),cos^(-1)(2//3)`C. `sqrt((3g)/3),cos^(-1)(2//3)`D. `sqrt((gl)/3),cos^(-1)(2//3)`
• A particle suspended from a fixed point, by a light inextensible thread of length L is projected horizontally from its lowest position with velocity 7gL . The thread will slack after swinging through an angle , such that  equalA. `30^(@)`B. `135^(@)`C. `120^(@)`D. `150^(@)`
• A given object taken n time more time to slide down `45^(@)` rough inclined plane as it taken to slide down a perfectly smooth `45^(@)` incline The coefficient of kintic friction between the object and the incline is .A. `1-1/n^(2)`B. `1/(1-n^(2)`C. `sqrt(1-1/n^(2))`D. `sqrt(1/(1-n^(2)))`
• A block slides down an inclined surface of inclination `30^0` with the horizontal. Starting from rest it covers 8 m in the first two seconds. Find the coefficietn of kinetic friction between the two.A. 0.11B. 0.5C. 0.8D. 0.2
• A spherical ball of mass 1/2 kg is held at the top of an inclined rough plane making angle 30º with the horizontal the coefficient of limiting friction is 0.5. If the ball just slides down the plane without rolling its acceleration down the plane is -A. `[(2-sqrt3)/4]`B. gC. `[(2sqrt(3-1))/4]g`D. `[(sqrt(3)-1)/2]g`
• Body A is placed on frictionless wedge making an angle  with the horizon. The horizontal acceleration towards left to be imparted to the wedge for the body A to freely fall vertically, is-A. `g sin theta`B. `g cos theta`C. `g tan theta`D. `g cot theta`