Mark and David are loading adentaical cement blocks on to David's pickup truck .Mark lifts his block straight up from the ground to the truck , whereas David slides his block up a ramp contining frictionless roles .Which statement is true about the work done on the block - Earth system?

Alex and john are loding adentical cabinates onto a truck .Alex lifts his cabinet strainght up from the ground to the bed of the truck , whereas john slides his cabinet up a rough ramp to the truck .which statement correct about the work on the cabinet- Earth system ?

small block of mass 200 g is kept at the top of a frictionless incline which is 10 m long and 3.2 m high. How much work was required a. to lift the block from the ground nd put it at the top b. to side the block up the incline? What will be the speed of the block when it reaches the ground if, c. it falls off the incline and drops vertically on the ground d. it slides down the incline? Take g=10 m/s^2 .

small block of mass 200 g is kept at the top of a frictioinless incline which is 10 m long and 3.2 m high. How much work was required a. to lift the block from the ground nd put it at thetop b. to side the block up the incline? What will be the speed of the block when it reaches the ground if, c. it falls off the incline and drops vertically on the ground d. it slides down the incline? Take g=10 m/s^2 .

A block of 1 kg is kept on a rough surface of an elevator moving up with constant velocity of 5 m/s. In 10 second work done by normal reaction (no sliding on incline surface) (i) from ground frame is 320 J (ii) is equal to work done by friction force in elevator frame (iii) is equal to work done by friction in ground frame