A car traveling at a speed of 18m/s loses its brake and falls into a 60-m cliff. Fill in the unknown quantities. Initial velocity

Time for the car to hit the ground

How far from the foot of the cliff will the car reach?

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Most short-period comets do not have randomly oriented orbits because

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity