Two stones of masses m and 2m are whirled in horizontal circles, the heavier one in a radius r/2 and the lighter one in radius r. The tangential speed of lighter stone is n times […]
A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches 30⁰, the box starts to slip and slides 4.0 […]
Three blocks A,B and C of masses 4 kg, 2 kg and 1 kg respectively are in contact on a frictionless surface as shown in fig. If a force of 14 N is applied on […]
A block of mass m1 rests on a horizontal table. A light string connected to it passes over a frictionless pulley at the edge of table and from its other end another block B of […]
The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is […]
A system consists of three masses m₁, m₂ and m₃ connected by a string passing over a pulley P. The mass m₁ hangs freely and m₂ and m₃ are on a rough horizontal table (the […]
A balloon with mass m is descending down with an acceleration a (where a
Force required to move a mass of 1kg at rest on a horizontal rough plane (μ = 0.1 and g = 9.8 m/s²) is
Options
(a) 0.98 N (b) 0.49 N (c) 9.8 […]
A body of mass 4 kg is accelerated upon by a constant force travels a distance of 5 m in the first second and a distance of 2 m in the third second. The force […]
A body of mass 3 kg is under a constant force which cause a displacement s in metres in it, given by the relation s=1/3 t², where t is in seconds. Work done by the […]
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