Acceleration - Mass over a pulley Lab Report Example | Topics and Well Written Essays - 1000 words

Acceleration - Mass over a pulley - Lab Report Example Newton’s second law motion, which one of these essential laws, can be stated mathematically as: F=ma (Shukla). This means that acceleration (a) of a moving object is directly proportional to applied force (F) and inversely proportional to the mass of the body (m) (Shukla). This acceleration is parallel and is in the direction of the net applied force. This experiment investigated Newton’s Second Law of Motion. i. This equation shows that provided that the mass of the body is constant, acceleration (a) of the body is directly proportional to the force applied (F). For Newton’s low to be valid the acceleration must take place in the direction of force, and must be parallel to it (Shipman). It is normally not easy to measure acceleration directly in experiments; therefore, an indirect method is used. In this case travel distances (x) and travel times (t) may be used. These times and distances can be used to calculate acceleration directly, or velocities (initial and final velocities) may be first calculated (Shipman). The velocities may finally be used to calculate acceleration. Therefore, For test 1, the experiment was set up as shown in the diagram above, but without the photogates. The direction of motion of the body M was noted. For both test 2 and test 3 photogates were installed, and were used to measure time taken (t) to travel the distance x. For test 2, the mass of the object (M) was kept constant while the suspended mass (F) varied using five different masses (50g, 75g, 100g, 125g, and 150g). For each suspended mass (F), the procedure was repeated for five different distances (20cm, 30cm, 40cm, 50cm and 60cm). Time taken to travel each distance xi for each mass was noted and recorded in the worksheet. For test 3, the suspended mass (F) was kept constant (75g) while the mass of the body (M) was varied; masses 500g, 750g, 1000g, 1250g and 1575g were used. For each mass, the procedure was repeated for five different

State of the World Atlas Essay Example | Topics and Well Written Essays - 250 words

State of the World Atlas - Essay Example Today obesity is serious health problem in most countries. â€Å"Who we are† was represented by literacy level. A person’s literacy level and education often determines what they eventually do with their life. â€Å"Health of the planet† part of the atlas was represented by rural population. Countries with huge urban population often are more polluted. From the above data, countries that had a huge urban population were the most affected by obesity. The size of the military was directly proportional to the GDP (PPP) of a country. Countries with higher literacy levels were more likely to tolerate persons of the LGBT community and same sax marriages were legal. From these data, countries that had a huge rural population also had lower literacy levels. Countries that had a huge urban population were more tolerant to the LGBT community. In some instances, such countries even allowed same sex