Question Answers
Sahay Sir > Question Answers
A particle is projected over a triangle from one extremity of its horizontal base. Grazing over the vertex, it falls on the other extremity of the base. If a and b are the base angles of the triangle and θ the angle of projection, prove that tanθ=tanα+tanβ
28
Aug
A particle is projected over a triangle from one extremity of its horizontal base. Grazing over the vertex, it falls on the other extremity of the base. If a and b are the base angles of the triangle and θ the angle of projection, prove that tanθ=tanα+tanβ A particle is projected over a triangle from [...]
A particle starting from the origin (0,0) moves in a straight line in the (x,y) plane. It’s coordinates at a later time are (3,3). The path of the particle makes with the x-axis an angle of
28
Aug
A particle starting from the origin (0,0) moves in a straight line in the (x,y) plane. It’s coordinates at a later time are (3,3). The path of the particle makes with the x-axis an angle of 0) moves in a straight line in the (x 3). The path of the particle makes with the x-axis [...]
From a point on the ground at a distance a from the foot of a pole, a ball is thrown at an angle of 45 ^ o , which just touches the top of the pole and strikes the ground at a distance of b, on the other side of it. Find the height of the pole.
28
Aug
From a point on the ground at a distance a from the foot of a pole, a ball is thrown at an angle of 45 ^ o , which just touches the top of the pole and strikes the ground at a distance of b, on the other side of it. Find the height of [...]
A particle has an initial velocity of (3i^ + 4j^) and an acceleration of (0.4i^ + 0.3j^). Its speed after 10s is:
28
Aug
A particle has an initial velocity of (3i^ + 4j^) and an acceleration of (0.4i^ + 0.3j^). Its speed after 10s is: A particle has an initial velocity of (3i^ + 4j^) and an acceleration of (0.4i^ + 0.3j^). Its speed after 10s is: August 28, 2020 Category: Chapter 4 - Motion in a Plane [...]
A particle is projected from the ground at t=0 so that on its way it just clears two vertical walls of equal height on the ground. The particle was projected with initial velocity u and at angle θ with the horizontal. If the particle passes just grazing top of the wall at time t=t 1 and t=t 2 then calculate. a. the height of the wall. b. the time t 1 and t 2 in terms of height of the wall. Write the expression for calculating the range of this projecting and separation between the walls.
28
Aug
A particle is projected from the ground at t=0 so that on its way it just clears two vertical walls of equal height on the ground. The particle was projected with initial velocity u and at angle θ with the horizontal. If the particle passes just grazing top of the wall at time t=t 1 [...]
A particle is moving such that its position coordinates (x, y) are (2 m, 3 m) at time t = 0, (6 m, 7 m) at time t = 2 s and (13 m, 14 m) at time t = 5 s. average velocity vector av (v ) from t = 0 to t = 5 s is
28
Aug
A particle is moving such that its position coordinates (x, y) are (2 m, 3 m) at time t = 0, (6 m, 7 m) at time t = 2 s and (13 m, 14 m) at time t = 5 s. average velocity vector av (v ) from t = 0 to t = [...]
A body is moving with velocity 30m/s towards east. after 10 seconds its velocity becomes 40m/s towards north. the average acceleration of the body is
28
Aug
A body is moving with velocity 30m/s towards east. after 10 seconds its velocity becomes 40m/s towards north. the average acceleration of the body is A body is moving with velocity 30m/s towards east. after 10 seconds its velocity becomes 40m/s towards north. the average acceleration of the body is August 28, 2020 Category: Chapter [...]
Two particles A and B are move with constant velocities v1 and v2. At the initial moment, their position vectors are r1 and r2 respectively. The condition for particles A and B for their collision is
28
Aug
Two particles A and B are move with constant velocities v1 and v2. At the initial moment, their position vectors are r1 and r2 respectively. The condition for particles A and B for their collision is their position vectors are r1 and r2 respectively. The condition for particles A and B for their collision is [...]
A jet of water is projected at an angle theta = 45 with horizontal from point A which is situated at a distance x = OA = (a) 1/2 m, (b) 2 m from a vertical wall. If the speed of projection is v0 = sqrt 10 m/s^-1, find point P of strinking of the water jet with the vertical wall.
28
Aug
A jet of water is projected at an angle theta = 45 with horizontal from point A which is situated at a distance x = OA = (a) 1/2 m, (b) 2 m from a vertical wall. If the speed of projection is v0 = sqrt 10 m/s^-1, find point P of strinking of the [...]
A ship A is moving Westwards with a speed of 10 km h^−1 and a ship B 100 km South of A is moving northwards with a speed of 10 km h^−1. The time after which the distance between them becomes shortest is
28
Aug
A ship A is moving Westwards with a speed of 10 km h^−1 and a ship B 100 km South of A is moving northwards with a speed of 10 km h^−1. The time after which the distance between them becomes shortest is The x and y coordinates of the particle at any time are [...]