The three equations of motion are:
1. Velocity equation: v = u + at, where v is final velocity, u is initial velocity, a is acceleration, and t is time.
2. Displacement equation: s = ut + 1/2at^2, where s is displacement, u is initial velocity, a is acceleration, and t is time.
3. Acceleration equation: v^2 = u^2 + 2as, where v is final velocity, u is initial velocity, a is acceleration, and s is displacement.
The direction of motion is determined by the sign of the values in the equations. A positive value indicates motion in the positive direction, while a negative value indicates motion in the negative direction.
Average velocity is the total displacement divided by the total time taken, while instantaneous velocity is the velocity at a specific moment in time. Average velocity is represented by v, while instantaneous velocity is represented by v(t).
To solve problems using the equations of motion, you need to identify the known and unknown variables, and then choose the appropriate equation to solve for the unknown variable. Plug in the known values and solve for the unknown variable.
The equations of motion can be used for motion in a straight line with constant acceleration. This includes motion in a horizontal direction, vertical direction, or at an angle. However, they cannot be used for motion with changing acceleration, such as circular motion.
