Afreight train has a mass of 1.0 ✕ 107 kg. if the locomotive can exert a constant pull of 6.9 ✕ 105 n, how long does it take to increase the speed of the train from rest to 68 km/h?

Choose each of the settings that follow and list them below do it ill mark brainliest first object= position= speed= acceleration= second object= position= speed= acceleration=

Explain what happens at the saturation point when adding salt to water at room temperature.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.