The two identical trucks are traveling in opposite directions, and truck B is carrying a heavy load. (a) Will the magnitude of the force exerted on truck A by truck B be greater than, less than, or equal to the magnitude of the force exerted on truck B by truck A

The force exerted on truck A by truck B will definitely be greater than the magnitude of the force exerted on truck B by truck A

Explanation:

According to the concept of momentum

Momentum is the product of a body's mass and its velocity.

Yes both trucks are the same, but truck B is carrying a heavy load which gives it more momentum that A, actually momentum is a function of mass

Momentum M=mass (m) x velocity (v)