Question

A force F applied to a crate of mass M at an angle a makes the crate move horizontally with a constant acceleration of magnitude a. The coefficient of kinetic friction between the crate and the surface is plk. M Select the correct expression for ||F|, the magnitude of the force. 1.7 - Ma + Mr Mg hk sin a 2. ĒI – Ma-MLM cos a - Masina 3. ] = Hk Mg-Ma cosa - Misina Ma+ με Mg cos a + Hy sina Matuk Mg 5. || || = 5. | F | cosa 6. ||Ě || = ? |_ Ma - Hk Mg Hk sina 7.ĚL = Hk M g - Ma cos a + Masina Μα- με Mg 8. || |1 = cosa + Husin a Μα+ με Mg 9. || || = - cosa - Miksin a 10. || || = 1 Ma- Hk M g cos a

Answer 1

Notes Solution) the Date_L is as follows? - situation Anafsing F ay t king officienct of Kinetic on Resoluing F in a components along X and Y asces- from the FBD of block the forceson the block are u n sink a a - fi fk ng and a acceleration along tx-anis - the foress there is along y-axis are balanced no moition in that direction- as 2 Fy=0 ) N+ F sina = Mg - N=ng-F sina and, along &- aris the Net forces are Ma G F = F loos fk = f cos &- lk N Mat 'F Losat Mk (Mg - F sine) oma=Ellosat uk sind) - UKM J IF = matuk M g option (4) is cost uk sina correct,