2. A woman lifts a single shopping bag weighing 100 N from the ground to a height of (a) 15 cm. She then walks 2.0 km on level ground carrying the bag at a constant height. Determine how much wor...
2. A woman lifts a single shopping bag weighing 100 N from the ground to a height of (a) 15 cm. She then walks 2.0 km on level ground carrying the bag at a constant height. Determine how much work has she done on the bag, in units of Calories where 1 Calorie 4.2 kJ. 13 marks] With reference to an equation for Conservation of Momentum, explain with the aid of a sketch why a heavier car is widely perceived to be safer to be in than a light car. 2 marks] Without fracture of the Femur, determine the maximumlheight. in cm, that a 70 kg woman can jump down from onto both of her heels where bare foot and keeping straight legs. Start your working from the definition of Young's modulus. (c) o Take the following values: her femur length, 1-60 cm, her femur area, A 3.5 cm2 Young's modulus for her bone, r 1.2 x 10c Nim2, and the rupture stress for her bone IS Ơmax 7.0x 107 N/m2. [5 marks] 6 ma 2 Page 2 of 8 C UCD 2018/19/Modular 4 62 L
2. A woman lifts a single shopping bag weighing 100 N from the ground to a height of (a) 15 cm. She then walks 2.0 km on level ground carrying the bag at a constant height. Determine how much work has she done on the bag, in units of Calories where 1 Calorie 4.2 kJ. 13 marks] With reference to an equation for Conservation of Momentum, explain with the aid of a sketch why a heavier car is widely perceived to be safer to be in than a light car. 2 marks] Without fracture of the Femur, determine the maximumlheight. in cm, that a 70 kg woman can jump down from onto both of her heels where bare foot and keeping straight legs. Start your working from the definition of Young's modulus. (c) o Take the following values: her femur length, 1-60 cm, her femur area, A 3.5 cm2 Young's modulus for her bone, r 1.2 x 10c Nim2, and the rupture stress for her bone IS Ơmax 7.0x 107 N/m2. [5 marks] 6 ma 2 Page 2 of 8 C UCD 2018/19/Modular 4 62 L