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 and Anita B Chris only C Barry and Chris D Dave only

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 and Anita B Chris only C Barry and Chris D Dave only

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 MM

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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 father demonstrates projectile motion to his children by placing a pea on his forks handle and rapidly depressing the curved tines, launching the pea to heights above the dining room table. Suppose the pea is launched at 8.25 m/s at an angle of 75.0 above the table. With what speed does the pea strike the ceiling 2.00 in above the table?
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 boy throws a ball upwards with a speed v0 = 17.0 m/s as shown belowThe wind imparts a horizontal acceleration of 2.60 m/s2 to the left. At what angle θθ from the vertical axis must the ball be thrown so that it returns to the point of release? Assume that the wind does not affect the vertical motion. Give your answer in degrees and rounded to two decimal places.
A stone is thrown from ground level with a speed of 10 m/s at an angle of 35° above the horizontal. How much time does it take to reach the maximum height? (answer numerically in hundredths of a second) What is the maximum height? (answer numerically in tenths of a meter) What is the horizontal range? (answer numerically in tenths of a meter)
William Tell must split the apple atop his son's head from a distance of 30 mm . When William aims directly at the apple, the arrow is horizontal. At what angle must he aim it to hit the apple if the arrow travels at a speed of 35 m/sm/s ? Express your answer using two significant figures.
A ball must decelerate from 20 m/s “up” to 0 m/s, then must accelerate to 10 m/s down. Since these velocities are vectors and are in different directions, they must be represented with different signs. Let up be positive and down be negative. (a = – 9.81 m/s2 acceleration due to gravity). Calculate the time it took the ball to go up and come back down.
A discus is thrown from ground level with a speed of 260 m/s at an angle of 60° above the horizontal. How much time does it take to reach the maximum height? (answer numerically in hundredths of a second) What is the maximum height? (answer numerically in tenths of a meter) What is the horizontal range? (answer numerically in tenths of a meter)
Given the following figure, please explain to me how the velocity of car A relative to car B is obtained. The correct answer is 11.40 m/s with an angle of 30.3 but I do not how to get that answer. Please explain it as I want to understand how to get this answer and how to approach this problem.
(The complete question is in the picture) The velocity of a particle as it moves alongthe trajectory (dashed line) is shown in the figure. Whatis the direction of the perpendicular (a⊥) and parallel (ak)components of the acceleration if the speed of the objectas it moves to the right is decreasing?A. a⊥ towards up and aktowards rightB. a⊥ towards down and aktowardsleftC. a⊥ towards up and aktowards leftD. a⊥ towards down and aktowardsright
Captain America throws Thor's Hammer from ground level with a speed of 400 m/s at an angle of 45° above the horizontal. How much time does it take to reach the maximum height? (answer numerically in hundredths of a second) What is the maximum height? (answer numerically in tenths of a meter) What is the horizontal range? (answer numerically in tenths of a meter)
The horizontal distance traveled by a ball moving with initial velocity v0 is ? = ?0,xt where v0,x is the x-component of v0. If a projectile is fired horizontally, v0,x = v0. A student measures a height of 1.27m for the gun when it is positioned horizontally. Calculate the time it will take for the ball to hit the ground when launched.