quite some questions, good thing i like cars
1. A passenger may be distracting which may be harmful. and a passenger may be helpful by pointing tings you missed and help you in situations
2. Low eyes, sick face, non understandable speaking, crooked walking and smell
3. by distracting you, by making you angry which may cause you to drive like a maniac, and by building on stress which will make you lose your patience which will make you want to drive faster
4. question is confusing but by what I understand. it would be checking mirrors, checking your seat position and adjusting your seat belt
Answer:
(a) Work done is 1.59642 kJ
(b) Useful power supplied = 0.1298 kW
Explanation:
(a) Work done = mass of crate × acceleration due to gravity × distance = 90.5 kg × 9.8 m/s^2 × 1.8 m = 1596.42 kgm^2/s^2 × 1 J/1 kgm^2/s^2 × 1 kJ/1000 J = 1.59642 kJ
(b) Useful power supplied = work done ÷ time = 1.59642 kJ ÷ 12.3 s = 0.1298 kJ/s × 1 kW/1 kJ/s = 0.1298 kW
