A car begins to move after having stopped at a traffic light. What must be true about all the forces acting on the car?

Identify two factors that determine the rate of stream erosion

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.