Aman of mass 80.0 kg stands on a platform of mass 40.0 kg. he pulls on a rope that is fastened to the platform and runs over a pulley on the ceiling. with what force does he have to pull in order to give himself and the platform and upward acceleration of 1.0 m/s²?

Apendulum has a mass of 1.5 kg and starts at a height of 0.4 m. if it is released from rest, how fast is it going when it reaches the lowest point of its path? acceleration due to gravity is g = 9.8 m/s2. a. 2.8 m/s b. 0 m/s c. 5.9 m/s d. 4.3 m/s

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving