A needle of sewing machine in a path of amplitude4c m long with frequency 5hz. What is its acceleration in `(1/30)` second after passing through the center of its path.

A needle of sewing machine moves in path of amplitude 2 cm and has a frequency at 10 Hz. Then what is its acceleration after (1/40) second after it has crossed its mean position ?

Three electrolytic cells A,B and C containing solutions of zinc sulphate, silver nitrate and copper sulphate, respectively are connected in series. A steady current of 1.5 A was passed through them until 1.45g of silver deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited in the concerned cells? ( Atomic mass of Ag= 108, Zn = 65.4, Cu = 63.5)

A particle is moving in a circle of radius 1.5m. Its speed is increasing by 180 rev/minute in one minute. What is it's linear acceleration ?

obtain the equation of hyperbola in each of the following cases: The transverse axis parallel to y-axis the hyperbola passes through the points (11/3,0) , (1,2) and its centre is the intersections of lines x+y-6=0 , 4x-y+1=0.

Two charged particles carrying equal charge enter into a magnetic field region after being accelerated through the same potential difference. The particles describe circular paths of radii R_1 and R_2 respectively. If m_1 and m_2 are the masses of the particles then ((m_1)/m_2) is given by