urrent Attempt in Progress Consult Conceptual Example 9 in preparation for this problem. The drawing shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a speed of 17.0 m/s via path 1. How fast is he moving on path 2 when he releases the rope at a height of 3.79 m above the water? Ignore the effects of air resistance. Number i Path 2 Units Path 1

Open Response 2: This is a multi-part problem. Please answer all parts here. A hollow sphere (m 0.5 kg, R = 0.8 m) is moving at 3 m/s down an incline. a. How fast is it moving after it has moved downward an additional 2 m in height? b. At what height would the sphere be moving at 5 m/s?

0.50 kg ... U, = 1.5 m/s r= 0.95 m 2.0 m 1.9 m An engineer is working on a new roller coaster, and he begins by making a scale model. On this model, a car of total mass 0.50 kg moves with negligible friction along the track shown in the figure. The car is given an initial speed vo = 1.5 m/s at the top of the first hill of height 2.0 m. Point A is located at a height of 1.9 m at the top of the second hill, the upper part of which is a circular arc of radius 0.95 m. Calculate the magnitude of the force of the track on the car at point A A 2.08 N B 3.07 N 3.25 N D 2.21 N

B3

A 62.0 kg skier is moving at 6.10 m/s on a frictionless, horizontal, snow-covered plateau when she encounters a rough patch 4.50 m long. The coefficient of kinetic friction between this patch and her skis is 0.300. After crossing the rough patch and returning to friction-free snow, she skis down an icy, frictionless hill 2.50 m high. ▼ Part A How fast is the skier moving when she gets to the bottom of the hill? Express your answer with the appropriate units. 1/2 = Submit ▾ Part B HA Value Request Answer Units ? How much internal energy was generated in crossing the rough patch? Express your answer with the appropriate units.

a) What is the speed of the basketball immediately before the collision, i.e. just before making contact with the ground? In other words, what is v,? b) What is the speed of the basketball immediately after the collision, i.e. just after the ball has decompressed? In other words, what is v;? c) Is the collision of the basketball with the ground an elastic or inelastic collision? Explain your answer and support it with calculations. d) Calculate the average force exerted by the ground on the basketball during the collision. In other words, calculate the average normal force during the collision.

Solve the following

A 149-g baseball is dropped from a tree 15.0 m above the ground. Part A With what speed would it hit the ground if air resistance could be ignored? Express your answer to three significant figures and include the appropriate units. V = Part B for Part A for Part A undo for Part A redo for Part A reset for Part A keyboard shortcuts for Part A help for Part A Submit Value Ffr = If it actually hits the ground with a speed of 7.50 m/s, what is the magnitude of the average force of air resistance exerted on it? Express your answer to three significant figures and include the appropriate units. Units Request Answer Submit for Part B for Part B undo for Part B redo for Part B reset for Part B keyboard shortcuts for Part B help for Part B Value Units Request Answer

Z Your answer is partially correct. Try again. In the figure here, two children are playing a game in which they try to hit a small box on the floor with a marble fired from a spring-loaded gun that is mounted on a table. The target box is horizontal distance D = 2.24 m from the edge of the table. Bobby compresses the spring 1.17 cm, but the center of the marble falls 29.0 cm short of the center of the box. How far should Rhoda compress the spring to score a direct hit? Assume that neither the spring nor the ball encounters friction in the gun. NumberT Unit -1.3 m the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work SHOW HINT LINK TO TEXT LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE search 10:38 PM ENG 4/4/2021 ASUS 13) shome pus O upea 3 4 8. E R Y

A 2.85 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0340 m. The spring has force constant 860 N/m. The coefficient of kinetic friction between the floor and the block is 0.380. The block and spring are released from rest and the block slides along the floor. Part A What is the speed of the block when it has moved a distance of 0.0170 m from its initial position? (At this point the spring is compressed 0.0170 m.) Express your answer with the appropriate units. v= O ΕΞΑ Value Units ?