A person drops a coin. Describe the path of the coin as seen by the person if he is in a. a car moving at constant velocity and b. in a freelyfalling elevator.

What is the acceleration of a race car that moves at constant velocity of 300 km/h ?

Define photoperiodism. Name the person who coined this term

Sand is being dropped on a conveyor belt at the rate of M kg//s . Tne force necessary to keep the belt moving with a constant velocity of v m//s will be:

Consider a game played by 10 prople in which each flips a fair coin at the same time. If all but one of the coins comes up the same, then the add persons wing (e.g., if there are nine tails and one head then person having lead wins.) If such a situation does not occur, the players flips again. Find the probability that game is settled on or after nth toss.

All the surfaces shown in figure are frictionless. The mass of the car is M, that of the block is mk and the spring has spring constant. Initialy the car and the block are at rest and the spring is stretched through a length x_0 when the system is released. a. Find the amplitude of the simple harmonic motion of the blocks and of the car as seen from the road. b. Find the time periods of the two simple harmonic motions.

A person standing oin the floor of an elevator drops as coin. The coin reaches the floor of the elevator in a time t_1 if the elevator is stationary and in the t_2 if it is moving uniformly. Then

In a game called odd man out m(m >2) persons toss a coin to determine who will but refreshments for the entire group. A person who gets an outcome different from that of the rest of the members of the group is called the odd man out. The probability that there is a loser in any game is 1//2m b. m//2^(m-1) c. 2//m d. none of these

A person is standing on a weighing machine placed on the floor of an elevator. The elevator starts going up with some acceleration, moves with uniform velocity for a while and finally decelerates to stop. The maximum and the minimum weights recorded are 72 kg and 60 kg. Assuming that the magnitudes of the acceleration and the deceleration are the same., find a. the true weight of the person and b. the magnitude of the acceleration. Take g=9.9 m/s^2 .

A siren is fitted on as car going towards a vertical wall at a speed of 36 km/h. A person standing on the ground, behind the car, listens to the siren sound coming directly from the source as well as that coming after refelction from the siren to the person and b. coming after reflection. Take the speed of sound to be 340ms^-1

A particle is found to be at rest when seen from a frame S_(1) and moving with a constant velocity when seen from another frame S_(2) . Select the possible options :