-You accelerate from -17m/s to 31m/s with an acceleration of 8m/s^2. What was your displacement during this time? Explain please

-A car accelerates from rest at 4 m/s^2.
What is the velocity of the car after 4 seconds? Explain please

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative