Consider a stationary trapezoidal block with mass of 5 kg situated on a surface as shown in the diagram below. The block is to be moved at a constant velocity by a constant pulling force F = 10 N along the inclined plane. (A = 60") A 16) What will be the weight W of the block in newtons? a) 49 b) 50 c) 51 -d) none of these 17) What will be the magnitude of the normal force N, exerted by the plane (in newtons)? a) 25 b) 44.2 c) 42.4 d) none of these 18) How much is the work done by the force F if the object moves 0.5 m from its initial position? a) 5 N-m b) 6 N-m c) 7 N-m d) none of these 19) Given the same displacement as in item no. 18, how much is the work done by the weight W? a) 24.5'N-m b) 21.21 N-m c) 12.25 N-m d) none of these 0) With the same value for displacement, what is the coefficient of friction (, if the magnitude of the work done by the kinetic frictional force is 12.7 newton-meters? a) 0.7 b) 0.5 C) 0.6 d) none of these