two boys, one with a mass of 60kg ad the other with a mass of 90kg, are standing still (at rest), next to each other in an ice rink. one of them pushes the other with a force of 360n. assuming the ice is frictionless: what is the acceleration of the 90kg boy?

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o