The position versus time for a certain object moving along the x-axis is shown. The object’s initial position is −1 m. Find the instantaneous velocity at 6.5 s. Answer in units of m/s.

Find the average velocity over the whole time shown. Answer in units of m/s.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

a. are

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.