A car traveled on a flat road. The car’s kinetic energy increased over time, while its potential energy remained constant. How did this change affect the car’s mechanical energy? *

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

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.

How many molecules are present in 3 mols of silicon dioxide (sio2)?