Suppose an object in free fall is dropped from a building. it's starting velocity is 0 m/s. what is the speed (in m/s) of the object after falling 2 seconds ?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

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.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force