A powered surgical cutting and fastening instrument comprising an end effector, an elongate shaft, and a handle is disclosed. The end effector comprises an elongate channel, an anvil, a cartridge including a longitudinal slot, fasteners removably stored in the cartridge, a sled, and a cutting member including a laterally extending member. The handle comprises a motor configured to output a rotary motion, an adaptive control system configured to control the rate of the rotary motion, a switch for energizing the motor, and a power source configured to supply a first power to the motor and a second power to the motor. The first power and the second power are different. The first power is proportionate to a first force experienced by the end effector and the second power is proportionate to a second force experienced by the end effector. The first force is different than the second force.