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Answer Problems 3 through 5 by choosing one of the eight labeled acceleration vectors or selecting option I: =
3. At this instant, the particle has steady speed and is curving to the right. What is the direction of its acceleration?
4. At this instant, the particle is speeding up and curving upward. What is the direction of its acceleration?
5. At this instant, the particle is speeding up and curving downward. What is the direction of its acceleration?
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Chapter 4 Solutions
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
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University Physics (14th Edition)
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University Physics Volume 2
Physics: Principles with Applications
- A particle moves along a path, and its speed increases with time. (i) In which of the following cases are its acceleration and velocity vectors parallel? (a) when the path is circular. (b) when the path is straight. (c) when the path is a parabola. (d) never. (ii) From the same choices, in which case are its acceleration and velocity vectors perpendicular everywhere along the path?arrow_forwardThe problem relates to the gliding flight of flying squirrels. These squirrels glide from tree to tree at a constant speed, moving in a straight line tipped below the vertical and steadily losing altitude as they move forward. Short and long glides have different profiles. A squirrel in a typical long glide covers a horizontal distance of 16 m while losing 8.0 m of elevation. During this glide,a. What is the angle of the squirrel’s path below the horizontal?b. What is the total distance covered by the squirrel?arrow_forwardThere are two frogs named Froggy and Jumpy. They jumped form the top of a vertical cliff. Froggy just drop and reaches the ground in 3.50 s, while Jumpy jumps horizontally with an initial speed 95 cm/s. A. How far from the base of the cliff will Jumpy hit the ground? B. How high is the vertical cliff? C. If Jumpy jumps with an angle of 30 degrees with respect to the horizontal, what should be its initial velocity for it to land on the same spot as he did when he jumped horizontally?arrow_forward
- An arrow is shot from a height of 1.75 m toward a cliff of height H. It is shot with a velocity of 32 m/s at an angle of 60° above the horizontal. It lands on the top edge of the cliff 3.65 s later.a. what is the maximum height reached by the arrow along its trajectory in meters?b. what is the arrows speed just before hitting the cliff in m/s?arrow_forwardYou are traveling to the North-East at 50 m/s. Simultaneously you are being pushed towards the East at a speed of 10 m/s. a. If you proceed in this manner for 10 minutes, what is the displacement vector from the t=0 location? b. How far do you travel in the East direction during these 10 mins.?arrow_forwardAt the equator, the radius of the Earth is approximately 6370km. A jet flies at a very low altitude at a constant speed of v=237m/s. Upon landing, the jet can produce an average deceleration of magnitude a=21.5m/s^2. A. How long, in seconds, will it take the jet to circle the Earth at the equator? B. What is the minimum landing distance, in meters, this jet needs to come to rest? Assume that, when the jet initially touches the ground, it is moving at the same speed as it was when it was flying.arrow_forward
- You wish to row straight across a 63-m-wide river. You can row at a steady 1.3 m/s relative to the water, and the river flows at 0.57 m/s A. In what direction should you head? Express your answer using two significant figures. B. How long will it take you to cross the river? Express your answer using two significant figures.arrow_forwardA snowball rolls off a barn roof that slopes downward at an angle of 40°. The edge of the roof is 14.0 m above the ground, and the snowball has a speed of 7.0 m/s as it rolls off the roof. PROVIDE ILLUSTRATIONS. a. How far from the edge of the barn does the snowball strike the ground if it doesn't strike anything else while falling? b. A man 1.9 m tall is standing 4.0 m from the edge of the barn. What is the vertical clearance between the man and the snowball.arrow_forwardAt a top of a building, a projectile is launched with an initial velocity of 25.0m/s at an angle of 30° above the horizontal. It takes the projectile t = 3.96s from launch to hit the ground. a. What is the height of the building? b. What is the velocity of the projectile as it hits the ground? (Magnitude + Direction) C. The horizontal range from the base of the building to the point where the projectile strikes the ground.arrow_forward
- An object is moving counter-clockwise in uniform circular motion at a constant speed of 3 m/s in a circle of radius 1.2 m. The magnitude of radial acceleration is 7.5 m/s?. Point A is at an angle of 15 degrees from the x axis. Sketching the position, velocity, and acceleration vectors may be helpful. A. Calculate the x and y components of the position vector for point A. B. Calculate the x and y components of the velocity vector for point A. C. Calculate the x and y components of the acceleration vector for point A. +y A +x 15° (0,0)arrow_forward1. a. At this instant, is the particle in FIGURE Q4.10 speeding up, slowing down, or traveling at constant speed? FIGURE Q4.1 a or traveling straight? V b. Is this particle curving to the right, curving to the left,arrow_forwardYou throw a ball toward a wall at speed 25.0 m/s and at angle 00 = 40.3° above the horizontal. The wall is distance d =24.3 m from the release point of the ball. a. How far above the release point does the ball hit the wall? b. What are the horizontal and vertical components of its velocity as it hits the wall? c. When it hits, has it passed the highest point on its Trajectory?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning