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question 7 help 7. A police cruiser has a light on the roof rotating 6 revolutions...
A lighthouse is located on a small island 2 km away from the nearest point P on a straight shoreline and its light makes four revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P? (Round your answer to one decimal place.) _____km/min
please help with this question! and show work
C9
Question 1 A rotating light is located 20 feet from a wall. The light completes one rotation every 3 seconds. Find the rate at which the light projected onto the wall is moving along the wall when the light's angle is 10 degrees from perpendicular to the wall. wall light a feet per second Answer is a positive value.
(1 point) A street light is at the top of a 17 ft pole. A 6 ft tall girl walks along a straight path away trom the pole with a speed of 7 ft/sec At what rate is the tip of her shadow moving away from the light (ie away from the top of the pole) when the girl is 35 ft away from the pole? Answer How fast is her shadow lengthening? Answer
Related Rates 5. An air traffic controller spots two planes at the same altitude converging on a point as they fly at right angles to each other. One plane is 225 miles from the point moving at 450 miles per hour. The other plane is 300 miles from the point moving at 600 miles per hour. a). At what rate is the distance between the planes decreasing? b). How much time does the air traffic controller have to get one...
Homework: Section 2.10 Homework Save Score: 0 of 1 pt 7 of 9 (4 complete) Hw score: 22.22%, 2 of 9 pts Gen Interest 2.10.25 Question Help A 25-foot ladder is placed against a vertical wall. Suppose the bottom of the ladder slides away from the wall at a constant rate of 2 feet per second. How fast is the top of the ladder sliding down the wall when the bottom is 24 feet from the wall? The ladder is...
A street light is mounted at the top of a 15-ft-tall pole. A man 6 ft tall walks away from the pole with a speed of 5 ft!s along a straight path. How fast is the tip of his shadow moving when he is 40 ft from the pole? The answer is 25/3. I let x be the length of shadow, y be the distance between man and pole. I did 6/15=x/(x y) then i got x=2/3y dx/dt=dy/dt(2/3) Then I...
I need help with question 7,
but you need info from question 6 to solve it. The answer to
question 6 is (B)
Problem 7: Consider again the radar gun and the car described in the preceding problem. Suppose the radar gun sends out only a very short microwave pulse towards the car, in order to measure the car's distance from the gun. For the car's distance stated in the preceding problem, how long will it take for the pulse...
Test Friday help please!
Chapter 4, Section 4.4, Question 039 Distance Across River. An engineer wants to construct a bridge across a fast-moving river, Using a straight line segment between two points that are 100 feet apart along his side of the river, he measures the angles formed when sighting the point on the other side where he wants to have the bndge Rnd. If the הngles formed at paints A and B are 69 and 11, respective how far...
5:16 lLTE ) Done 1 of 5 Assessment #1 (Kinematics of a Particle) Rectilinear Motion (Straight linc Motion 3. The position of a point during the interval of time from r otor 6 is given by ** * m. (a) What is the maximum velocity during this interval of time, and at what time does it occur? (b) What is the acceleration when the velocity is a maximum? (20 m/s, 0 m/s 3. A test projectile is fired horizontally into...
help :(
(diagrams 2,3,4 are included here )
QUESTION 7 A box is at rest on a horizontal, frictionless table. Horizontal force F1 points along the positive x-axis; when it is the only force acting on the box, the box accelerates at 6.75 m/s. Force F3 is also horizontal; it has magnitude 2.85F, and acts at an angle 22.6° to the direction of F1. If forces F1 and F3 act on the box at the same time, find the magnitude...