An overhang beam ABC of length 4m is supported at A and B 3m apart. It is loaded with UDL of 5kN/m along its entire length. Find the value of load 'P' at C such that the reactions A and B are equal and opposite.
- A. P = 10 kN
- B. P = 30 kN
- C. P = 20 kN
- D. P = 25 kN
Answer: C. P = 20 kN
Explanation: For reactions to be equal and opposite ($R_A = -R_B$), the net vertical reaction force is zero, which implies the net external vertical load is zero if P acts upwards. With UDL 20kN down, P must be 20kN up.