10/25/2023 0 Comments Law of motion![]() ![]() Let H be maximum height attained by the particle.ĭirection of air resistance force is in the direction of motion.Ī person standing on the floor of an elevator drops a coin. Let acceleration due to air resistance force be a. (d) the relation between t 1 and t 2 depends on the mass of the particle Answer-12 Let the air exert a constant resistance force = F (in downward direction).Īcceleration of particle A in downward direction due to air resistance, a A = F / m A.Īcceleration of particle B in downward direction due to air resistance, a B = F / m B. The option (b) A will go higher than B. is correct (d) Any of the above three may happen depending on the speed with which the objects are thrown. ![]() (a) The two bodies will reach the same height. Suppose the air exerts a constant and equal force of resistance on the two bodies. Two objects A and B are thrown upward simultaneously with the same speed. is correctĪny force applied in the direction opposite the motion of the particle decelerates it to rest. Force F 1 is then replaced by F 2 which decelerates the particle to rest. (c) fly along a tangent to the earth’s surfaceĪ force F 1 acts on a particle accelerating it from rest to a velocity v. A person standing on the surface of the earth will. Suppose the earth suddenly stops attracting objects placed near its surface. Neglect the effect of rotation of the earth. The force exerted by the wedge on the block has a magnitude.įree-body Diagram of the Small Block of Mass ‘m’ The whole system is accelerated horizontally so that the block does not slip on the wedge. Question-6Ī block of mass m is placed on a smooth wedge of inclination θ. Normal force exerted by the plane on the block is mg cosθ. ![]() The force exerted by the plane on the block has a magnitude. Question-5Ī block of mass m is placed on a smooth inclined plane of inclination θ with the horizontal. Therefore, both the spring balances will read the same mass, i.e. The option (a) Both the scales will read 10 kg. (d) The readings may be anything but their sums will be 10 kg. (c) The upper scale will read 10 kg and the lower zero. Question-4Ī block of mass 10 kg is suspended from two light spring balances, as shown in the following figure (5-Q.2). The car pushes the ground in the backward direction and according to the third law of motion, reaction force of the ground in the forward direction acts on the car. Question-3Ī car accelerates on a horizontal road due to the force exerted by. The horse pushes the ground in the backward direction and, in turn, the ground pushes the horse in the forward direction, according to Newton’s third law of motion. The option (b) the ground on the horse is correct When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by The ceiling fan pulls the chain by a force w 1 + w 2 Question-2 HC Verma Solutions Concept of Physics Vol-1 Ch-5 for Class-11Ī body of weight w 1 is suspended from the ceiling of a room by a chain of weight w 2. ![]()
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