2006-11-13 21:42:25 · 6 answers · asked by Alexander M 1 in Science & Mathematics ➔ Physics
-5ms-1. Speed and velocity are just different words for the same thing, and neither are dependent on direction.
2006-11-13 21:47:47 · answer #1 · answered by Stephen L 7 · 0⤊ 1⤋
The speed would decrease by 5 ms-1. (Speed does not depend on direction)
The velocity (assuming that you are taking due east to be the positive direction) then whilst travelling due south you have a velocity of 0. Therefore your change in velocity would be 30-0 = 30 ms-1.
2006-11-14 02:10:29 · answer #2 · answered by kizerking 2 · 0⤊ 0⤋
Speed is a scalar quantity which means it has only magnitude but no direction. It does not depend on direction so change in speed is 'final speed - initial speed' ie 25 m/s - 30 m/s = -5 m/s
Velocity is a vector quantity which has magnitude and direction.
initial velocity is 30 m/s due east
final velocity is 25 m/s due south
If we draw the direction it will be a right angle. joining the end points it will be a right angle triangle. The hypotenuse shows the resultant direction ie south-east direction.
resultant velocity=sqrt(25^2+30^2) = sqrt(625+900)=sqrt(1525)=39.05 m/s in south-east direction
2006-11-13 22:05:02 · answer #3 · answered by lingaraja b 2 · 0⤊ 0⤋
The change in speed is -5 ms-1, u have to simply subtract the values here.
Velocity change must include direction as well:
change in velocity = 25 along south - 30 along east.
Its magnitude is square root of ( 25 squared + 30 squared) = 39.05 ms-1
2006-11-13 21:54:54 · answer #4 · answered by king 1 · 0⤊ 0⤋
change in speed is 5m/sec.
change in velocity is 5*(71)^0.5
2006-11-13 21:51:01 · answer #5 · answered by Anonymous · 0⤊ 0⤋
slowing by 5ms-1 speed and 90degree in direction.
2006-11-14 01:09:55 · answer #6 · answered by Palestini Detective 4 · 0⤊ 0⤋