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To help you, we have included a summary of questions, formulas, examples, and definitions from the grade 11 and grade 12 physics units. However if you do have problems, you should still go in for extra help because these outlines are VERY, VERY brief.
Grade 12
All the equations that you have learned from the past will be useful in grade 12. In fact, most of the grade 12 formulas are an expanded/more complicated version of the grade 11 ones.
In the special theory of relativity mass and energy are equivalent. When an object's velocity increases so does its energy and hence its mass equivalent. It thus requires more force to accelerate it the same amount than it did at a lower velocity. Newton's second law remains formally valid but in order to be conserved, momentum must be redefined as mentioned.
The relativistic expression relating force and acceleration for a particle with non-zero rest mass m, moving in the x, direction is:
Newton's Law of Gravitation states that the force on a spherical object of mass m1 due to the gravitational pull of mass m2 is:
where r is the distance between the two objects' centers of mass and r is the unit vector pointed in the direction away from the center of the first object toward the center of the second object.
For an object accelerating in circular motion, the unbalanced force acting on the object is equal to: 
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