This implies suppose there was a 10% error in value of l, it will reflect an erratic value of g having a margin of 10%. Results Table 1: Data Results L (M) T50 (S) T (S) T (S) T (S) T (S) T2 (S2) g (M/S2) 50 65 80 95 110 Discussion Formula and effects on experimental accuracy Based on the experimental results, error in L prompts a linear relation error in any resulting value of g. T2 graph with the intention of ascertaining its slope, which was the value for g (Serway, Jewett & Vahe? 465). The last step encompassed plotting of L vs. Recording of data included g and its mean values besides standard error deviations. After tabulation, calculation commenced to ascertain T2 and g values. Timing was at intervals of 10 oscillations for each chosen L until it reached about 125cm and having at intervals of 15cm, then tabulating obtained data.
It was essential to ensure motion in this case was vertical instead of erratic elliptical, which mostly develops due to inappropriate displacement.
Then displacement of a pendulum using a certain angle before released to swing back and forth took place. This is by hanging pendulum or bob using a string from the supporting board where there is a hook, then adjusting L to approximately 50cm or appropriate length that will act as the initial value. L / T2 Methodology Experiment Materials required Piece of string, which is lighter such that its weight is negligible Hook Pendulum or bob Stopwatch Meter rule or tape measure Supporting board for hook Steps to perform experiment The first step entailed setting up the experiment. In quest to find g, this experiment utilizes the following formula, T = 2? / ? = 2? v (L/g) = 2? v (L/g) by rearranging g = 2? This is because at the poles the surface is flattened compared to the equator where there is bulging due to a large radius, which is the reason behind an individual’s location being the determinant of g. This is due to earth’s radii changes caused by both altitude and latitude variations as one moves to the poles whereby distance to the crust continues to decrease. Aeroplanes cannot travel at this velocity.Īns:The acceleration due to gravity on the surface of the earth is 9.8ms–2.9.8ms–2. Gravity is the force exerted by the Earth on objects present on and around it. Why cannot aeroplanes be used to go into outer space?Īns: A minimum velocity is required to escape from earth’s gravitational force, called escape velocity. Why do we say that unit of weight is Newton?Īns: Weight is the force due to the mass acting downwards. So, acceleration due to gravity is more at the poles.
Poles are closer to the centre than the equator. Where is acceleration due to gravity is maximum?Īns: Acceleration due to gravity is inversely proportional to the square of the distance between the centre and the surface. The most frequently asked questions about acceleration due to gravity are answered here: Mass is a scalar, and weight is a vector. Mass is the measure of amount of substance present in an object, whereas weight is the force due to gravity on it. \(g\) decreases with an increase in depth below the surface.ĭ. \(g\) decreases with an increase in height above the surface.Ĭ. If the initial velocity was \(u,\) and after \(t\) seconds, it changed to velocity, \(v,\) then this means that- \(.\) All the freefalling objects fall towards earth with this acceleration.ī. When an object is in motion, it can change velocity due to force on it. It means that acceleration is a change in velocity divided by time. We define acceleration as the rate of change of velocity. Study About Acceleration Due to Gravity What is Acceleration?
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