A marble has to roll down a ramp and then travel a distance of 3 m. The ramp's height supported by 4 books, When the marble rolls down, it travels only 2 meters. How can the ramp be modified to increase distance the marble travels? Please help fast

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?