A Constant force f is applied on a particle of mass 'm' which is initially at rest. As the particle starts moving a resistive force -bv begins to act on it.Speed of the particle at any instant of time 't' is?

Anonymous User Physics Laws of Motion and Friction 28 May, 2020 1 Answer 64 views

Let A be a 2 × 2 matrix with real entries. Let I be the 2 × 2 identity matrix. Denote by tr(A), the sum of diagonal entries of A. Assume that A2 = I.

Statement­1 : If A  I and A – I, then det A = –1.

Statement­2 : If A  I and A – I, then tr(A)  0.

Anonymous User Maths Complex Numbers 27 May, 2020 1 Answer 56 views

A motor boat going down stream over came a raft at a point A, t = 60 min later it turned back and after some time passed the raft at a distance l = 6.0 km from the point A. Find the flow velocity assuming the duty of the engine to be constant?

Anonymous User Physics 26 May, 2020 1 Answer 59 views

A current carrying wire heats a metal rod. The wire provides a constant power (P) to the rod. The metal rod is enclosed in an insulated container. It is observed that the temperature (T) in the metal rod changes with time (t) as

Where is a constant with appropiate dimension with is a constant with dimension of temperature .

The heat capacity of the metal is?

Anonymous User Physics 26 May, 2020 1 Answer 73 views

Three distinct points A, B and C are given in the 2–dimensional coordinate plane such that the ratio of the distance of any one of them from the point (1, 0) to the distance from the point (–1, 0) is equal to 1/3 . Then the circumcentre of the triangle ABC is at the point :-

Anonymous User Maths Circle 22 May, 2020 1 Answer 56 views