Relative Motion

Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is

• 30 km/hr

• 45 km/hr

• 60 km/hr

• 75 km/hr

Tags

NGSS.HS-PS2-2

Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is

• 9

• 9.6

• 10

• 10.8

Two goods train each 500 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one

• 12 sec

• 24 sec

• 48 sec

• 60 sec

Two trains are running in opposite directions with the same speed. If the length of each train is 120 metres and they cross each other in 12 seconds, then the speed of each train (in km/hr) is

• 10

• 18

• 36

• 72

Tags

NGSS.MS-PS3-1

A train 'P' 108 m long moving at a speed of 50 km/hr crosses a train 'Q' 112 m long coming from opposite direction in 6 seconds. The speed of the train 'Q' is

• 48 km/hr

• 54 km/hr

• 66 km/hr

• 82 km/hr

Bill runs 400 meters to Andy's house, turns around, and runs 400 meters back home.  What is Bill's displacement?

• 0 meters

• 400 meters

• 800 meters

• 1600 meters

This motion map shows an object...

• not moving

• moving with constant velocity

• moving with changing velocity

Find the velocity of a plane that traveled 3000 miles west in 5 hours.

• 65 mph west

• 6 mph west

• 600 mph west

• 6000 mph west 

The change in an objects position from the final position to initial position.

• displacement

• distance

• motion

• reference point

This position vs. time graph shows an object...

• not moving

• moving with constant velocity

• moving with changing velocity