1. A child pulls a wagon of mass 12 kg at a constant velocity along a level sidewalk. The child does this by applying a 22- newton force to the wagon handle, which is inclined at 35° to the sidewalk as shown in the figure. After some time, the child lifts a toy box of weight 40 N from the wagon and continues its motion with the same force to the wagon handle. Find out a) the initial frictional force between the wagon and level sidewalk. | b) the coefficient of kinetic friction between the wheels of the wagon and the level sidewalk c) the normal force on the wagon when the child lifts the toy box. d) the acceleration of the wagon if there is any when the child lifts the toy box. 22 N 35° Level sidewalk

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: