Mike is complaining that he did 150 j of work when moving a couch that has a mass of 30 kg a distance of 15 m. how much force did he use to move the couch?

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

Steelhead trout migrate up stream to spawn.occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b.leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?