A roller coaster car is near the bonom of its tracks shown in Figure 3. At this point, the normal force
on the roller coaster is 3.5 times its weight. The speed
of the roller coaster is 26 m/s. Determine the radius of the tracks curvature

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.

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

Which are causes of mechanical weathering? (check all that apply) a. acid rain b. plant growth c. animal actions d. carbon dioxide e. pressure release i chose b & e and got the question wrong.