Physics chapters
Relative Motion
2 JEE Main questions · Physics
Motion in a plane – kinematics
A river of width 200 m is flowing from west to east with a speed of 18 km/h. A boat, moving with speed of 36 km/h in still water, is made to travel one-round trip (bank to bank of the river). Minimum time taken by the boat for this journey and also the displacement along the river bank are and respectively.- (1)20 s and 100 m
- (2)40 s and 0 m
- (3)40 s and 200 m
- (4)40 s and 100 m
Motion in a straight line
Two cars A and B are moving in the same direction along a straight line with speeds 100 km/h and 80 km/h, respectively such that car A is moving ahead of car B. A person in car B throws a stone with a speed so that it hits the car A with a speed of 5 m/s. The value of is km/h.- (1)18
- (2)28
- (3)38
- (4)48