A 0.40 kg object is moving on a frictionless surface with a speed of 30 m/s. A force of 2.0 N is
applied continually until the velocity of the object
has been reversed. How long was the force
applied?

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Smallest intensity of a stimulus that you can detect 50 percent of the time is

Atypical jetliner lands at a speed of 146 mi/h and decelerates at the rate of (10.4 mi/h)/s. if the jetliner travels at a constant speed of 146 mi/h for 1.5 s after landing before applying the brakes, what is the total displacement of the jetliner between touchdown on the runway and coming to rest?