50) A crate is dragged 3 meters along a smooth level floor by a 30 N force, applied at 25" to the floor. Then, it is pulled 4 meters up a ramp inclined at 20 to the horizontal, using the same force. Then, the crate is dragged a further 5 meters along a level platform using the same force again. Determine the total work done in moving the crate. 51) How much work is done against gravity' by a worker who carries a 25-kg carton up a 6 meter long set of stairs, inclined at 30. 4?) Determine the projection oftE on 13 a) Il = 56, Il = 100, angle 6' between I? and 13" is 125. 48) Find the magnitude of the projection of E on 3 and also the vector projection of ['1' on 3 if a = [6, 1] and E = [11,51 491A superhero pulls herself 15 m up the side of a wall with a with a force of 500 N, at an angle of 12 to the vertical. What is the work done