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Grade: 12
        
a motor cycle is going due to north ata speed of 50 km/h.it makes a 90 degrees left turn without  changingthe speed.the change in the velocity is
one month ago

Answers : (2)

Saurabh Koranglekar
askIITians Faculty
3441 Points
one month ago
Vikas TU
10070 Points
							
Dear student 
 
consider these velocities on an x-y plane with vectors i and j (+i = East, -i = West, +j = North, -j = South): 

initial velocity = 50j. 

final velocity = -50i. 

change in velocity (Δv) = final velocity – initial velocity = -50i -50j 
 
and  -i direction (west) and -j direction (south), so the total change in velocity will be pointing towards the southwest.

|Δv| = √[(-50)² + (-50)²] 
|Δv| = 70.7 km/h
Hope this helps 
Good Luck 
one month ago
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