Answer Happy

Q 1(b) [2 marks] State the angular Impulse Momentum Theorem in the form of an equation. Q 1(c) [10 Marks] An athlete in a sitting position performs leg (a) flexion/extension exercises (Figure 1.3). The weight of the athletes lower leg is W1 = 45N and the weight of the boot is W2 = 100N. As measured from the knee joint at O, the centre of gravity (A) of the lower leg is located at a distance a = 20cm and the centre of gravity (B) of the weight boot is located at a distance of b = 50 (b) cm. 1 1 CE 0 B 1 W1 Determine the net moment generated about the knee joint when the lower leg is extended horizontally (position 1), and when the lower leg makes and angle of 60 degrees (position 3). W2 2 3 4 Figure 1.3