A 1,700 kg car is being used to give a 1,400 kg car a push start by exerting a force of

140 N. The impulse on the smaller car during the 30.0 s of contact is +670 kg•m/s.

What is the impulse of the smaller car on the larger car?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

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.

Emagnitude of the electrical force acting between a +2.4 ×  10–8  c charge and a +1.8 ×  10–6  c charge that are separated by 0.008 m is    n, rounded to the tenths place.