Question

Question 1[10 points) (a) When you walk across a surface, which force causes you to move forward? Draw a free-body diagram indicating the relevant forces. [2 points) (b) A 2.00 kg mass on a string is being moved vertically by means of a rope. The tension in the rope is measured to be 16.0 N. i. Draw the free body diagram for the mass. Clearly label all the forces. 14 points) ii. Determine the acceleration of the mass. [2 points) iii. Is the mass being raised or lowered? Justify your answer. [2 points)

Answer 1

The concept used is in this question is of force balance , initially i draw the free body diagram when we walk after that i deduced that frictional force or the reaction on account of our action force is responsible for us to move on the road after i solved second part and i found that the force due to the weight of the block us higher than the tension in the string which is equal to the applied force , so the block is being lowered.

(a) frictional force causes us to move forwand. Ny Normal force F It is the force applied on I road By us. w y weight Fuet - It is the neet (Action) force applied By us when we applied the met fonce then ground will produce the reactive force on us. Road Fuel Net Reaction fonce By Road on ground on us. Scanned with CamScanner

F friction frietion force is force offesired By road on 45 due to our action force.. * | 2.00kg T Tension in the string T is equal to applied force of 16.00 Weight (W) = 2.00 x 9,81 - 19.62 N I (i) FBD Represents block m mass of Block mig Scanned with CamScanner

My G - Ja my xa 2 x 9 19,62 -16 = Ta = 1.81 m/s2 - Direction of acceleration Mass is being lowered since a my g 7T so Net acceleration dentically downward so the mass being lowered is in Scanned with CamScanner

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