Rod AB has mass m and length l there is no friction between

Rod AB has mass m and length l, there is no friction between the rod and the inclined surface, and cos beta = 4/5. The rod is released from rest at an initial angle theta from the vertical. If the initial value of theta is theta = beta, then immediately after the rod is released: the normal force acting on the rod at A is 2/5mg 3/5mg 3/4mg 4/5mg 3/10mg the magnitude of the acceleration of the center of mass is 2/5g 3/5g 3/4g 4/5g 3/10g If the initial value of theta is theta = 0. then immediately after the rod is released: the normal force acting on the rod at A is 18/73mg 72/73mg 15/73mg 18/13mg 5/13mg the magnitude of the angular acceleration theta is 18/73g/l 72/73g/l 15/73g/l 18/13g/l 5/13g/l

Solution

solution

(a)

the normal force acting on the rod at A is

(iv) 4/5 (mg)

(b)

the magnitude of the acceleration of the center of mass is

(iv) 4/5 (g)

(c)

the normal force acting on the rod at A is

(iv) 72/73 (mg)

(d)

the magnitude of the acceleration of the center of mass is

(ii) 72/73 (g / l )