Relative Motion (Test 1)

Two trains A and B are moving in the same direction at 60 km/h and 80 km/h respectively. What is the relative speed of B with respect to A?

A man swims downstream at 6 km/h and upstream at 2 km/h. What is the speed of the current?

A car is moving at 60 km/h and a truck is moving at 40 km/h in the opposite direction. What is their relative speed?

A boat takes 2 hours to go 20 km downstream and 4 hours to return. What is the speed of the current?

If a train is moving at 90 km/h and a man is running in the same direction at 10 km/h, what is the speed of the train relative to the man?

Two cars are moving in opposite directions at 60 km/h and 40 km/h. What is their relative speed?

A man can row at 5 km/h in still water. If the river flows at 2 km/h, how long will he take to row 12 km downstream?

A train overtakes a man walking at 5 km/h in the same direction in 10 seconds. If the train is 150 m long, what is its speed?

A car is moving at 60 km/h. A person inside throws a ball forward at 20 km/h. What is the speed of the ball relative to a stationary observer?

A train 300 m long is moving at 90 km/h. How long will it take to cross a man standing on the platform?