The equation below was developed using Fitts’ law to describe the operation of the foot pedals (accelerator, brake, and clutch) of a large forklift truck. The model was developed with particular reference to the time taken for the right foot to move from the accelerator pedal to the brake pedal when driving the truck on uneven ground. The model was built by observing real drivers in a simulator in which the values of A (movement amplitude) and W (pedal width) were systematically manipulated. The truck speed rarely exceeded 20km/h. In order to achieve the required stopping distance the driver has to be able to react in 0.25 seconds.

MT = 0.1 + 0.154log_2(2A/W)

a) Find the value of ID that will deliver a MT to the brake pedal of 0.25 seconds.

b) What is the ratio of interpedal distance (A) to pedal width (W) that will deliver a MT of 0.25 seconds?

Answer rating: 100% (QA)

a 0 25 0 1 0 154 log 2 2 A W 0 154 log 2 2 A W 0 15 log 2 2 A W 0 98 2 A W 100 A W 50 ... View the full answer