A toy car rolls up a ramp(an inclined plane). Assume the direction up the ramp is positive. If the toy car starts with a speed of 3.45 m/s and slows at a constant rate of -0.2 m/s2, then what is its speed after 1.1s?

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

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 ia the energy of an object because of its potential and kinetic energies