Question

Please help! If the instantaneous speed of an object remains constant, can its instantaneous velocity change? If the instantaneous velocity of an object remains constant, can its instantaneous speed change?

Answer 1

speed is how fast; velocity is speed in a given direction

Answer 2

a tethered ball can have constant speed, and its velocity is changing; a change in velocity is known as acceleration

Answer 3

ohh..

Answer 4

speed is independant of velocity; but velocity relies on speed

500 mph is speed; 500 mph to the north is velocity if im reading it right

Answer 5

yup.

Answer 6

if velocity = 500 mph to the north and you change its speed, the velocity is changed as well

Answer 7

ohhh! that's true.

Answer 8

I would answer it like this; but im no expert at it :)

If the instantaneous speed of an object remains constant, can its instantaneous velocity change? Yes.

If the instantaneous velocity of an object remains constant, can its instantaneous speed change? No

Answer 9

but why?

Answer 10

for the same reasons that i listed above ....

Answer 11

ohh, okay.

Answer 12

a change in velocity is called acceleration. By definition of physics.

acceleration is a change in speed or a change in direction , or both

Answer 13

ohh, okay I think i get it :) thank you!

Answer 14

yep, good luck :)

Answer 15

velocity is a vector but speed is a scalar.
the magnitude of velocity(instantaneous) is called as speed.
for the velocity to change it may have change in its magnitude(speed) or in its direction or in both.

For the bodies moving with constant speed along the curved path , the direction of their velocity vector(tangent to the path) changes at every point on its way.
so, velocity is changing even though the speed is constant.

2) If velocity is constant, which means both its magnitude (speed) and direction are constant (not changing with time).
so speed can't be changed.