Question

conclusion of force and friction​

Answer 1

Answer:

We measured the friction coefficient of a rigid body sliding on a powder layer. As a result, we found that friction coefficient became small at a speed higher than a critical value. The obtained friction coefficient was smaller than the normal friction coefficient between rigid bodies

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Answer 2

Answer:

.. force is in the direation of mortion than the speed of object increases and whenever it opposite to the direction of motion it speed decreases.

Explanation:

And the force always need not change state of motion .....

....i hop you understand....