In a free-fall experiment, an object is dropped from a heigh…

In a free-fall experiment, an object is dropped from a height of  feet. A camera on the ground 500 feet from the point of impact records the fall of the object as shown in the figure. Assuming the object is released at time . Find the rate of change of the angle of elevation of the camera when . Round your answer to four decimal places.​​

A petrol car is parked  feet from a long warehouse (see the…

A petrol car is parked  feet from a long warehouse (see the figure below). The revolving light on top of the car turns at a rate of 30 revolutions per minute. How fast is the light beam moving along the wall when the beam makes an angle of  with the perpendicular from the light to the wall.