Assertion:- A piece of copper and a similar piece of stone are dropped simultaneously from a height near the earth's surface. Both will touch the ground at the same time.
Reason:- There is not effect of the earth's magnetic field on the motion of falling bodies.

Asseration: A metal piece and a non-metal (stone) piece are dropped from the same height near earth's surface. Both will reach the earth's surface simultaneousely. Reason: There is no effect of earth's magnetic field on freely falling body.

Two bodies x and y of weight 600 N and 1000 N are dropped simultaneously from the same height above the earth's surface from same place. Their accelerations will be

Two balls are dropped from heights h and 2h respectively from the earth surface. The ratio of time of these balls to reach the earth is.

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

A ball is projected upwards from a height h above the surface of the earth with velocity v. The time at which the ball strikes the ground is

Assertion : A solid sphere and a ring of same mass and radius are released simultaneously from the top of an inclined surface. The two objects roll down the plane without slipping. They reach the bottom of the incline with equal linear speeds Reason : Decrease in potential enery for both is the same.

A monoenergetic (18 keV) electron beam initially in the horizontal direction is subjected to a horizontal magnetic field of 0.04 G normal to the initial direction. Estimate the up or down deflection of the beam over a distance of 30 cm (me = 9.11 × 10^(–31) kg) . [Note: Data in this exercise are so chosen that the answer will give you an idea of the effect of earth’s magnetic field on the motion of the electron beam from the electron gun to the screen in a TV set.]

Two objects of massses m_(1) and m_(2) having the same size are dropped simultaneously from hights h_(1) and h_(2) respectively. Find out the ratio of time they would take in reaching the ground. Will this ratio remain the same if (i)one of the objects is hollow and the other one is solid and (ii)both of them are hollow, size remaining the same in each case. give reason.

On the earth, a stone is thrown from a height in a direction parallel to the earth's surfaces while another stone is simultaneously dropped from the same height. Which stone whould reach the ground first and why ?