Guide :High School

A particle undergoes two displacements. The first has a

A particle undergoes two displacements. The first has a magnitude of 150 cm and makes an angle of 120° with the positive x axis. The resultant displacement has a magnitude of 140 cm and is directed a
First you need to draw the picture of the problem to better understand it. Like the one bellow. In this task you have 2 sides of triangle and we can calculate angle between them. Angle between them is 120 - 35 = 85 degrees.Once you have those 3 variables you can calculate third side of triangle using cosine law.a - second displacementb - first displacementc- resultant we just need to calculate this.a = 196now, we use cosine law again to find the angle between second and first displacement. degreesThe angle marked with "?" in the graph is our direction angle. We will call it Second displacement has magnitude of 196 and a direction of -14.64 with positive x axis ...

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