Motion in 1D Questions

Water drops fall from a tap on the floor, 5 m below, at regular intervals of time, the first drop strikes the floor when the sixth drop begins to fall. The height at which the fourth drop will be from ground, at the instant when the first drop strike

A person walks up a stalled escalator in 90 sec. When standing on the same escalator now moving, he is carried in 60 sec. The time he would take to walk up the moving escalator will be-

A 0.06 kg wooden block is dropped from a 150 m tall tower. Simultaneously, a 0.04 kg bullet is fired vertically upwards from the ground at 1 150 m s−1 . The bullet embeds perfectly into the block. Determine the maximum height reached by the combined