From the following statements about the point of maximum height (point A) in the trajectory of the projectile shown in the figure: I. The acceleration and velocity of the projectile are perpendicular. II. The speed of the projectile is the smallest of the entire path in the air. II. The velocity of the projectile has a magnitude of 0 m / s. IV. The projectile is in the middle of the total time that it will remain in the air. Which are true?

From the following statements about the point of maximum height (point A) in the trajectory of the projectile shown in the figure: I. The acceleration and velocity of the projectile are perpendicular. II. The speed of the projectile is the smallest of the entire path in the air. II. The velocity of the projectile has a magnitude of 0 m / s. IV. The projectile is in the middle of the total time that it will remain in the air. Which are true?

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: Motion In Two Dimensions

Section: Chapter Questions

Problem 13P: A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed...

See similar textbooks

Similar questions

A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of vi= 18.0 m/s. The cliff is h = 50.0 m above a body of water as shown in Figure P3.19. (a) What are the coordinates of the initial position of the stone? (b) What are the components of the initial velocity of the stone? (c) What is the appropriate analysis model for the vertical motion of the stone? (d) What is the appropriate analysis model for the horizontal motion of the stone? (e) Write symbolic equations for the x and y components of the velocity of the stone as a function of time. (f) Write symbolic equations for the position of the stone as a function of time. (g) How long after being released does the stone strike the water below the cliff? (h) With what speed and angle of impact does the stone land?
The same vectors that are shown in Figure P3.6 are shown in Figure P3.42. The magnitudes are F1 = 1.90f, F2 = f, and F3 = 1.4f, where f is a constant. a. Use the coordinate system shown in Figure P3.42 to find R=F1+F2+F3 in component form in terms of f. b. If Rx = 0.33, what is Ry? c. Check your result by comparing your answer to that of Problem 6. FIGURE P3.42
A If the vector components of a particles position moving in the xy plane as a function of time are x=bt2i and y=ct3j, where b and c are positive constants with the appropriate dimensions such that the components will be in meters, at what time t is the angle between the particles velocity and the x axis equal to 45?
(a) A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 32° ramp at a speed of 40.0 m/s (144 km/h). How many buses can he clear if the top of the takeoff ramp is at the same height as the bus tops and the buses are 20.0 m long? (b) Discuss what your answer implies about the margin of error in this act—that is, consider how much greater the range is than the horizontal distance he must travel to miss the end of the last bus. (Neglect air resistance.)
Two birds begin next to each other and then fly through the air at the same elevation above level ground at 22.5 m/s. One flies northeast, and the other flies northwest. After flying for 10.5 s, what is the distance between them? Ignore the curvature of the Earth.
A rugby player passes the ball 7.00 m across the field, where it is caught at the same height as it left his hand. (a) At what angle was the ball thrown if its initial speed was 12.0 m/s, assuming that the smaller of the possible angles was used? (b) What other angle gives the same range, and why would it not be used? (c) How long did this pass take?
A World War II bomber flies horizontally over level terrain with a speed of 275 m/s relative to the ground and at an altitude of 3.00 km. The bombardier releases one bomb. (a) How far does the bomb travel horizontally between its release and its impact on the ground? Ignore the effects of air resistance. (b) The pilot maintains the planes original course, altitude, and speed through a storm of flak. Where is the plane when the bomb hits the ground? (c) The bomb hits the target seen in the telescopic bombsight at the moment of the bombs release. At what angle from the vertical was the bombsight set?
A During the battle of Bunker Hill, Colonel William Prescott ordered the American Army to bombard the British Army camped near Boston. The projectiles had an initial velocity of v measured in meters per second at an angle above the horizon and an initial position that was h higher than where they hit the ground. How far did the projectiles move horizontally before they hit the ground? Ignore air resistance.
A velocity vector has a magnitude of 720 m/s. Two students draw arrows representing this vector. Clarisse chooses a scale such that 1 cm 100 m/s. a. What is the length of the arrow that Clarisse draws? b. Francoiss arrow is half as long as Clarisses. What is Francoiss scale? c. Is one students choice better than the other? If so, what makes it a better scale?
Use three decimal places on answers Problem1: A projectile leaves at a velocity of 50 m/s at an angle of 30° with the horizontal. a. Find the maximum vertical distance it could reach. b. Find the maximum horizontal distance it could reach. c. Find the total time which the projectile could reach the ground.
At 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.
A person in the passenger basket of a hot-air balloon throws a ball horizontally outward from the basket with speed 10 m/s a. What initial velocity (magnitude and direction) does the ball have relative to a person standing on the ground if the hot-air balloon is rising at 5.0 m/sm/s relative to the ground during this throw? b. Express your answer to three significant figures and include the appropriate units. c. What initial velocity (magnitude and direction) does the ball have relative to a person standing on the ground if the hot-air balloon is descending at 5.0 m/sm/srelative to the ground? d. Express your answer to three significant figures and include the appropriate units.