Question

Estimate the average pressure exerted on the ground by a red kangaroo when it jumps straight up to a 1.6 m height. Use the following parameters: the kangaroo's mass m - 44.3 kg, the time of the contact between the kangaroo's feet and the ground during the jump t = 0.16 sec, and the kangaroo's foot area A = 29.6 cm². Assume that the kangaroo jumps by pushing with it's both feet. The pressure produced by the jumping kangaroo, P- Units Select an answer Just for comparison, calculate the pressure exerted on the ground by a 10,200-Lb elephant standing on one foot with an area of 180 in?. The pressure produced by the elephant, P2 Units Select an answer

Answer 1

mass of elephant = 100 200 lb 104,200 lb = 4626.64 leg Since velocity is independent of mass V= 5.6 m/s : F- Amv_4624.64 x 5.6 dt 0.16 D) 161.8624 KN. Pressure - Force Area Area = 100 in ²= Orll6 m² . Pressure Pressure = 161862.4 o.116 1395. 365 kPa gor k M/m2