**1. Homework Statement**

1.) an object starts at a velocity of 3.0m/s and accelerates at 4.0m/s^2. Find:

a)the velocity at 2.0s

b)how far it traveled in the first 4.0 s.

c)how far it traveled in the third second.

d)the time it will take to travel 90.0m.

2.)An object starts at rest and accelerates constantly so it moves 22.0m in the sixth second. Find the acceleration.

3.)A car initially traveling at an unknown velocity ends up doubling its velocity in 6,0s while traveling 225.0m. Find:

a)the initial velocity.

b)the acceleration at 3.0 s.

c)the time when it was traveling 10.0m/s faster than when it started.

4.) A curling rock is traveling at a constant of 2.25m/s. If a sweeper starts from the same spot the rock started from and was at rest until 2.00s after the rock started and then accelerates at 1.4m/s^2, find.

a) the time(from when the rock started) they were both going the same speed.

b)how far apart they are at 6.0s after the rock started.

3. The Attempt at a Solution [/b]

Im pretty sure that I have the right answers for a through c so here they are:

a)11m/s

b)76m

c)13m

but I have no clue where to start with d

and the last 3 im pretty lost as well.