1) a roller coaster at an amusement park goes from the top of a tall hill to the bottom. during this time, the roller coaster a) gains both potential and kinetic energy b) loses both potential and kinetic energy c) loses kinetic energy and gains potential energy d) loses potential energy and gains kinetic energy

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2