Question

TOTAL USE OF SMARTPHONE DURING EXAM IS PROSCRIBED PART A: WORK ENERGY Problem A1: A 103kg car requires 12hp to cruise at a steady 80km/h on a level road. What would be the power required to move up to a 10°incline at the same speed? Assume that the total frictional force due to the road and air resistance is fixed. A pump raises water from a well of depth 20m at a rate of 10kg/s and discharges it at 6m/s. What is the power of the motor? 10 Pawer ? m-10 K9 rahp P-W t P= Tu casfe

Answer 1

1 Kg P-1212x746-8952 W 22:22 ms we Ronaw tRat PEEX2 952 22.22 402.&0 N This i theterce exestaal oy engine Since Casr moves olt Com ant Veloct net force em Casr aill be qual to 0oo force 1e. frichon& ar g031stamce -O Fa F force engine =402.88N air Resistame Fagine masi 19 let forsce along ndmed felame lhould be again 0so betause Car moves HA Centent ofead Fengine-mg sine +tas vests tan a But tta g0sistemce - F 1-e Faugine-(gne +F)O Faugine= gsine Fa

402-88 1Ox9.8x Simi 2104.63 N Faugine Nou ane nequin eol te meve p- P- Feugne X = 2104.63 x 22-22 P-46764.88W P - 62.69 Ap