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As the value of 𝑔 in the question is given as 9.8 m/s 2, we must consider the displacement in metres rather than centimetres. So, the displacement is 1.96 m . The formula for the displacement 𝑠 is 𝑠 = 𝑢 𝑡 + 1 2 𝑎 𝑡 , where 𝑢 is the initial velocity, 𝑡 is the time, and 𝑎 is the acceleration.
In our first example, we will use this formula to compute the vector moment of a force on a plane about a point. Example 1: Finding the Moment of a Force Vector about a Point. If the force ⃑ 𝐹 = − 5 ⃑ 𝑖 + 𝑚 ⃑ 𝑗 is acting at the point 𝐴 ( 7, 3), determine the moment of ⃑ 𝐹 about the point 𝐵 ( 7, − 2). Answer.
