A5.1-m-diameter merry-go-round is initially turning with a 4.1 s period. it slows down and stops in 25 s . part a before slowing, what is the speed of a child on the rim? express your answer to two significant figures and include the appropriate units. vv = nothing nothing request answer part b how many revolutions does the merry-go-round make as it stops? express your answer using two significant figures. δθδ θ = nothing rev

Alarge truck is moving 22.0 m/s. if it’s momentum is 125,000 kg • m/s, what is the trucks mass

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *