Acart loaded with bricks has a total mass of 28.3 kg and is pulled at constant speed by a rope. the rope is inclined at 23.1◦ above the horizontal and the cart moves 28.7 m on a horizontal floor. the coefficient of kinetic friction between ground and cart is 0.2. the acceleration of gravity is 9.8 m/s2. how much work is done on the cart by the rope? answer in units of kj

The energy released by a nuclear fusion reaction is produced when

Determine the largest intensity w of the uniform loading that can be applied to the frame without causing either the average normal stress or the average shear stress at section b–b to exceed σ=19 mpa and τ=24 mpa, respectively.

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)