Aball is tossed with enough speed straight up so that it is in the air serveral seconds. assume upwards direction is positive and downward is negative. what is the change in its velocity during this 1-s interval?

- 32.17 fts/s in the imperial system, -9.8 m/s in the SI

Explanation:

We know that acceleration its the derivative of velocity with respect to time, this is (in 1D):

So, if we wanna know the change in velocity, we can take the integral:

Luckily for us, the acceleration in this problem is constant

the minus sign its necessary, as downward direction is negative. Now, for a interval of 1 second, we got:

taking g in the SI

this is:

or, in imperial units:

this is:

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

have a great day!

which three statements are true about all alloys?