An object of mass m is initially at rest. after a force of magnitude f acts on it for a time t, the object has a speed v. suppose the mass of the object is doubled, and the magnitude of the force acting on it is quadrupled. in terms of t, how long does it take for the object to accelerate from rest to a speed v now?

It takes to accelerate the object from rest to the speed v.

Explanation:

From Newton's second law:

 (1)

and the definition of acceleration,

(2)

we can solve this problem. Putting (2) in (1) we have:

and solving for and considering the initial time as zero () and the initial velocity also zero () we have:

Now, for a mass and the we can wrtie the same equation:

and substituting and :

So now, it only takes half the time to accelerate the object from rest to the speed v

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.