A body of mass 5kg is acted upon by two perpendicular forces 8N and 6N. Give the magnitude and direction of the acceleration of the body.
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When forces F1 , F2 , F3 are acting on a particle of mass m such that F2 and F3 are mutually perpendicular, then the particle remains stationary.
(a) : F2 and F3 have a resultant equivalent to F1 Therefore, Acceleration = F1/m.
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A particle is acted upon by a force of constant magnitude.
c) : No work is done when a force of constant magnitude always acts at right angles to the velocity of a particle when the motion of the particle takes...
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A body A of mass M while falling vertically downwards under gravity breaks into two parts; a body B of mass (1/3)M and body C of mass (2/3)M.
(d) : The centre of mass of bodies B and C taken together does not shift as no external force is applied horizontally.
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A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the
(c) its kinetic energy is constant (d) it moves in a circular path. Explanation: Since the force is always perpendicular to the velocity, it means there is no displacement in the direction of...
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A body rotating at 20 rad/s is acted upon by a constant torque providing it a deceleration of 2 rad/s ^2.
Initial angular velocity = 20 rad/s Therefore α = 2 rad/s2 t1 = ω/α 1 = 20/2 = 10 sec Therefore 10 sec it will come to rest. Since the same torque continues to act...
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A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle.
(c) its kinetic energy is constant (d) it moves in a circular path. Explanation: Since the force is always perpendicular to the velocity, it means there is no displacement in the direction of...
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Give one example for each of the following types of inter-particle forces (a) London dispersion forces (b)Dipole-Dipole forces
(a) noble gases. (b) between HCl molecules. (c) Between water molecules or HF molecules. (d)Between NO3 - and water molecules
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A rope of mass 5kg is moving vertically in vertical position with an upwards force of 100N
(B) The tension at midpoint of the rope is 85N.
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A particle is acted simultaneously by mutually perpendicular simple hormonic motions x = a cos ωt and y = a sin ωt
Trajectory of motion of the particle will be (c) a circle.
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A person of mass 60 kg wants to lose 5kg by going up and down a 10m high stairs. Assume he burns twice as much fat while going up than coming down.
5 x 7000 x 103 4.2J = 60 x 15 x 10 x N N = (21 x 7 x 106/900) = (147/9) x 103 = 16.3 x 103 times.
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