A projectile is thrown with a launch angle of 38°. The graph below shows the y-component of its velocity. (The x-component of its velocity is not shown.) At what time does the projectile reach its maximum height? +20 +10 1 3 4 -10 -20 (su)A
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- 1. A ball is thrown into the air with an initial x velocity of 15 m/s and an initial y velocity 10 m/s from an initial height of 20 m. a) What is the maximum height of the ball? How long does it take the ball to reach its maximum height? b) What is the range of the ball?A brick is thrown upward from the top of a building at an angle of 15° to the horizontal and with an initial speed of 12 m/s. If the brick is in flight for 3.3 s, how tall is the building? mThree balls are launched simultaneously, as in the figure. The red ball is launched at an initial velocity Vodirected at an angle & above the horizontal. The blue ball is launched vertically with a speed of 10.3 m/s, and the yellow ball is launched horizontally with a speed of 5.20 m/s. The blue and red balls reach identical maximum heights and return to the ground at the same time, and the red ball returns to the ground to meet the yellow ball at the same place along the horizontal. Find (a) the launch speed vo and (b) the launch angle for the red ball. hmax 10.3m/s VO A 5.20 m/s (a) Number i (b) Number i Units Units
- The position of a bird in the xy-plane is given by = (4.0m-x t²)î + Btĵ where x= 2.5 m/s2 and B = 5 m/s . What is the magnitude of bird's net velocity at 2.0 s? %3D 4.0 m/s O7.1 m/s O 11.2 m/s 15 m/s O -5.0 m/sA soccer ball is kicked from the ground with an initial speed of 19.5 m/s at an upward angle of 44.3°. A player 53.7 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground? Neglect air resistance. Use g=9.81 m/s². Number i UnitA) With what speed, in meters per second, does the stone strike the ground? vf=
- In a ballistic pendulum lab we used the law of projectile to determine the initial velocity. The ball was released with some initial speed V from the table, the table has an altitude of 1.1 m and the ball land 2.3 m away. What is the muzzle velocity of the ball as it shot from the gun? 4.9 m/s O 7.0 m/s O 6.1 m/s O 8.0 m/sstudent throws a heavy red ball horizontally from a balcony of a tall building with aninitial speed v0. At the same time, a second student throws a lighter blue ball horizontally fromthe same balcony with an initial speed v0 /2. Ignoring air resistance, which of the followingstatements must be true?a. The red ball hits the ground with the greater speed.b. Both balls hit the ground with the same vertical velocity component.c. Both balls hit the ground with the same angle of impactd. The balls reach the ground at the same instant. More than one of the statements can be true.a) the place where the rock lands. b) the velocity of the rock (magnitude and direction) just before it lands.
- A plane releases a package from an altitude of 300 meters. At the time of release, both the plane and package are moving at 100 meters per second, directed at an angle of 20 degrees below the horizontal. How long is the package in the air? Find the magnitude and direction of the velocity of the package just before impact? Draw a sketch or diagram of the problem. Thank you for your help.Two projectiles are launched from the same point at the same angle, but the first one has twice the initial velocity compared to the second. The ranges R1 and R2 are: O A. R2 = 4R1 O B. R1 = 4R2 OC R2= 2R1 OD R1 = R2 O E None of the above.Professional golfers can drive the ball over 200 m. While air resistance is significant, its effects are nearly canceled because lift is gained from backspin on the ball, and so a reasonable description of the ball’s trajectory is obtained if air resistance is neglected. Suppose a golfer hits a ball 200 m on level ground, giving it an initial velocity at an angle of 45o. The duration of the impact of the club and ball has been measured to be 1.00 ms. a) Calculate the velocity of the ball just after it is struck b) What is the 0.0450 kg ball's change in momentum?