What is the difference between speed and velocity when the ball is in contact with the ground?

Question

anonymous · Answer

The difference between speed and velocity is that velocity gives the direction but speed doesn't. So according to this, I think that the speed will be zero. However, the direction will be downwards because of gravity.

anonymous · Answer

BTW, this only works if the ball is still... if it isn't tell me the state of the ball.

anonymous · Answer

They gave me that the overall change in speed is 1.5 m/s and overall change in velocity is 17. 5 from a speed- time graph in which a ball is falling down, hits the ground and then rising up without air resistance and I have so many questions asked about this but on the one that i stucked on is that I have to find the difference between them when the ball hits the ground and then rebounds vertically upwards.

anonymous · Answer

Thank you for replying by the way!

anonymous · Answer

As in the difference in what the speed distance time? what exactly?

vincent-lyon.fr · Answer

Can you post the FULL question as it was given to you please?

anonymous · Answer

A small ball falls vertically, hits the ground and rebounds vertically upwards and they show me a speed time graph with given speed and velocity as I mentioned and the question is Explain the difference between speed and velocity when the ball is in contact with the ground...

anonymous · Answer

crazychemist the difference between speed and velocity

anonymous · Answer

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anonymous · Answer

Sometimes it's best to think of speed and velocity in terms of its derivatives, position.
Remember that distance is the total amount traveled, whereas displacement is the net amount traveled. Distance is always a magnitude - you can go whatever direction you want and still "increase" distance. Displacement is characterized with a magnitude AND vector. If you go forward 5 meters and then back 5 meters, your displacement is 0 meters while your distance traveled is 10 meters.

Knowing that, then we can see that:
$$\large Average \ Speed = \frac{ Distance }{ Time }$$But,$$\large Average \ Velocity=\frac{ \Delta Position }{ \Delta Time }$$

Hope this helps!

anonymous · Answer

Thank you Shrix!

vincent-lyon.fr · Answer

In your case, speed is simply the absolute value of velocity.
The velocity graph would look like this if up is positive:

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