angle that the plane makes with the horizontal is now decreased. 1 How will this change the kinetic frictional force acting on block A Choose from INCREASES, DECREASES or REMAINS TH SAME 2 Explain the answer to QUESTION 2.4.1.

When the angle that the plane makes with the horizontal is decreased, the kinetic frictional force acting on block A DECREASES. As the angle of the incline becomes less steep, the normal force acting on block A increases, which affects the frictional force. Kinetic friction is given by the equation \( f_k = \mu_k N \), where \( \mu_k \) is the coefficient of kinetic friction and \( N \) is the normal force. As the incline decreases, while N indeed increases, the component of gravity acting parallel to the incline (which influences the motion of block A) also decreases, leading to a situation where the net force acting in the direction of motion is less. As a result, the kinetic frictional force working against the motion of block A decreases, allowing it to slide more easily down the less steep incline.