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:

the closer the planet is to the sun, the larger the gravity

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2