3. A 0. 200 kg air-track glider moving at 1. 20 m/s bumps into a 0. 600 kg glider at rest. (a) find the total kinetic energy after collision if the collision is elastic. (b) find the total kinetic energy after collision if the collision is completely inelastic.

Nathan is an ecologist. he’s studying the effect of secondary consumers on primary consumers. his current research focuses on a population of blue jays and crows. they eat caterpillars and mice. if the number of blue jays increases, what are the likely effects on other populations? 1the number of crows will increase. 2the number of mice will decrease. 3the number of mice will remain the same. 4the number of caterpillars will decrease.