Who do you agree with? Anita: "A projectile's vx changes because of gravity, and its vy remains constant." Barry: "Both vx and vy are constant." Chris: "A projectile has no acceleration in the vertical dimension but it does accelerate horizontally." Dave: "A projectile has vertical acceleration and a constant horizontal velocity" (A) Dave only B) Chris only C Barry and Chris D Dave and Anita

Who do you agree with? Anita: "A projectile's vx changes because of gravity, and its vy remains constant." Barry: "Both vx and vy are constant." Chris: "A projectile has no acceleration in the vertical dimension but it does accelerate horizontally." Dave: "A projectile has vertical acceleration and a constant horizontal velocity" (A) Dave only B) Chris only C Barry and Chris D Dave and Anita

An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter2: Motion

Section: Chapter Questions

Problem HM

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World’s Longest Par 3. The tee of the world’s longest par 3 sits atop South Africa’s Hanglip Mountain at 400.0 m above the green and can only be reached by helicopter. The horizontal distance to the green is 359.0 in. Neglect air resistance and answer the following questions. (a) If a golfer launches a shot that is 40 with respect to the horizontal, what initial velocity must she give the ball? (b) What is the time to reach the green?
A map suggests that Atlanta is 730 miles in a direction 5.00c north of east from Dallas. The same map shows that Chicago is 560 miles in a direction 21.0 west of north from Atlanta. Figure P3.18 shows the location of these three cities. Modeling the Earth as flat, use this information to find the displacement from Dallas to Chicago. Figure P3.18
KEY TERMS 1. physics (intro) 2. position (2.1) 3. motion 4. scalar (2.2) 5. vector 6. average speed 7. distance 8. instantaneous speed 9. average velocity 10. displacement 11. instantaneous velocity 12. acceleration (2.3) 13. average acceleration 14. acceleration due to gravity 15. free fall 16. terminal velocity 17. centripetal acceleration (2.4) 18. projectile motion (2.5) For each of the following items, fill in the number of the appropriate Key Term from the preceding list. a. _____ Zero acceleration in free fall
A seagull flies at a velocity of 9.00 m/s straight into the wind. (a) If it takes the bird 20.0 min to travel 6.00 km relative to the Earth, what is the velocity of the wind? (b) If the bird turns around and flies with the wind, how long will he take to return 6.00 km? (c) Discuss how the wind affects the total round-trip time compared to what it would be with no wind.
Two students are on a balcony a distance h above the street. One student throws a ball vertically downward at a speed vi, at the same time, the other student throws a ball vertically upward at the same speed. Answer the following symbolically in terms of vi, g, h. and t. (a) What is the time interval between when the first ball strikes the ground and the second ball strikes the ground? (b) Find the velocity of each ball as it strikes the ground, (c) How far apart are the balls at a time t after they are thrown and before they strike the ground?
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Suppose an outfielder throws a baseball with an initial speed of 12 m/s in a direction 30° up from the horizontal. Use a trajectory diagram to determine the height of the peak of its trajectory in reality. I suggest using a time step of Δt = 0.2s and a scale of 1.0 m (in reality) = 2.0 cm (on diagram). The height of the peak of its trajectory in reality is _____ m.
A ball moving at +4.5 m/s along a table rolls off a table and lands on the ground 2.05m away. How long will it take before the ball hits the ground? How high was the table? (Hint ; Solve for time first; then vertical (height) distance) I'm not sure what the formula is or how to solve this equation.
The horizontal distance or range (R) of an object thrown at an angle θ from the horizontal is represented by the equation below where v0 is the initial velocity as the object leaves the hand, in feet per second. If v0 = 2500 feet per second and θ is changed from 13° to 14°, use differentials to approximate the change in range, in feet.
A car accelerates at 4 m/s2 for 3 seconds. The direction of its acceleration is due west. If its initial velocity was 45 m/s, due east, and its initial position is zero, what is its final position? Round your answer to the nearest meter. Choose positive direction east.
If you drop a textbook off a building that is 100 m tall, how much time will pass before the textbook hits the ground? Select one: Oa. Between 5 and 10 seconds Ob. Less than 1 second Oc. Between 1 and 5 seconds Od. More than 10 seconds o