Question

Suppose you walk across a room of length 9 m with a velocity of 1.5 km h-1.
Express this velocity in m/s and find the time you will take to move across the
room.
1) 20.6 s
2) 21.6 s
3) 22.6 s
4) 23.6 s​

Answer 1

ANSWER

       

     The answer is 21.6 s

Answer 2

Answer:

Explanation:

Displacement=9 m

Velocity= 1.5 km/ hr

=  = (1000/3600)m/s

=5/18 m/s

To convert km/hr to m/s , just multiply the given value of km/hr by 5/18

1.5 km/hr = 1.5×5/18 = 0.4166 m/s

velocity=displacement/Time

Time=Displacement/velocity

      =9/0.4166

      =21.603 sec