Can work done by a force be negative

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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.

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?