A railway truck A of mass 2000kg moves westwards with a velocity of 3m. s. it collides with a stationery truck B of mass 1200kg, loaded with electronic equipment of mass 300kg. The two trucks combined after the collision. Ignore the effects of friction. 7.1 wite down magnitude and direction of the 'reaction force ' to the weight of truck A. 7.2 calculate the velocity of truck B after the collision 7.3 calculate the magnitude of the force that truck A exerts on truck B if the collision lasts for 0.5s

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?

Which describes increasing the efficiency of energy resource