A graphing calculator is recommended. If a ball is thrown into the air with an initial velocity of 52 ft/s, its height in feet after t seconds is given by y = 52t − 16t2. Required:
a. Find the average velocity of the ball (in ft/s) for the time interval beginning at t = 2 and lasting for each of the following.

(i) 0.5 seconds ft/s
(ii) 0.1 seconds ft/s
(iii) 0.05 seconds ft/s (iv) 0.01 seconds ft/s

b. Use your answers from part (a) to estimate the instantaneous velocity (in ft/s) when t = 2. ft/s

Iflow from a warmer object to a cooler object until both objects are the same temperature what am i?

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction