PART 1: FREE-FALL KINEMATICS 1. A ball is thrown downward with an initial speed of 20 m/s on Earth.
a. What is the acceleration of the ball?
b. Calculate the displacement during the first 4 s.
C. Calculate the time required to reach a speed of 50 m/s.
d. Calculate the time required to fall 300 m (Hint: factor the quadratic or use the quadratic formula).
e. Calculate the speed after falling 100 m.

not moving. pos accel,

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .