A roller coaster approaches the top of a 37-meter hill traveling 2.5 m/s. The coaster descends the hill and travels up the next hill, which has a height of 17 m. Ignoring all aspects of friction and air resistance, determine the speed (in m/s) of the coaster at the top of the 17-meter hill.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Does anyone have the answers to online physics course plato course physics, semester a v3.0

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.