Analyzing a dynamic event in a psuedo-static manner involves a number of assumptions:

1) You're assuming the actual response of the system is dominated by a single degree of freedom. If this isn't true for your system, your results are "less than accurate". Unfortunately you won't know this unless you perform a dynamic analysis.

2) You'll be assuming a DLF (dynamic load factor) of 2, which is hopefully not too conservative. Again, you won't know this unless you perform a dynamic analysis.

3) You'll have to "walk" that force around your system. In any given load case, you only want the hammer force acting on one node.