An object of mass m is dropped at t=0 from the roof of a building of height h. while the object is falling, a wind blowing parallel to the face of the building exerts a constant horizontal force f on the object.
a) at what time t does the object strike the ground?
b) find an expression in terms of m and f for the acceleration in the horizontal direction.
c) how far is the object displaced horizontally before hitting the ground? answer in terms of m, g, f, and h.
d) find the magnitude of the object’s acceleration while it is falling, using the variables f, m, and g.

Rubber on floor tile has a coefficient of kinetic friction of 1.0 and a coefficient of static friction of 2.0. how much force would a 3.5 lb. robot need to produce in order to start moving?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !