If a 400 n force is applied to a 10 kg object, how fast will it accelerate? a) 40 m/s2 b) 40000 m/s2 c) 4000 m/s2 d) 4 m/s2

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.

What practical value did astronomy offer to ancient civilizations?