Motion In One Dimension question bank (Physics)

Two cars, P and Q move toward each other, getting $8\ \text{m}$ closer every second. If they move in the same direction, they get $0.6\ \text{m}$ closer every second. If car P is faster than car Q then, the ratio of speeds of car P to car Q is

A block is kept on the floor of an elevator at rest. The elevator starts descending with acceleration of $5\ \text{m/s}^2$. The displacement of the block during the first $0.2\ \text{s}$ after the start is $\{$Take $g = 10\ \text{m/s}^2\}$