Help with a physics TEST (im desperate)

[Killvenom]

First of all Hi!
Im from Bulgaria (Europe for the ones who don't know where BG is) and I am new to the forum
Im 14 and I've started learning physics in german (i learn in a german high school..)
I might have a bit of mistakes /mainly spelling/ so please excuse me for them...
So tommorow I am having a physics test and a friend made a photo of it
I calculeted most of the exercises but this one i didnt

Its easy perhaps (for you) but not for me:
For the guys who speak german
[Removed German. As per the forum guidelines, all posts must be in English]

For English speakers
A body is moving and weighs 4kg and s = 4t - 4.squaret
The movement type is
V=??
The whole Force (power) is ? N

 

[PhanthomJay]

Killvenom

Welcome to PF!

Your formula for displacement, s, is in the form of the basic kinematic motion equation with constant acceleration, that is, $$s = V_ot +1/2at^2$$. From this you can get certain information. You need more given information to get all the requested information. The net force can be obtained from Newton's 2nd law.

 

[unscientific]

force isn't power. Power = Instantaneous force x velocity

P = Fv