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- Viy=? 30 Va-326m/s A rocket is fired at an angle of 30° above the horizontal. If the x-component of its initial velocity is vix (Take g = 10 m/s?). 326 m/s, what is the y-component of its initial velocity ? ( Viy =?) (A) 188.2 m/s (B) 376.4 m/s (C) 330 m/s (D) 250 m/s (E) 163 m/s O B4. A ball travels horizontally off a table 1.0 meters above the ground with a velocity of 1.51 m/s. If the ball is to travel through the center of a hoop which is placed 0.20 meters above the ground, then how far (xf) from the base of the table should the center of the hoop be placed? (Hint: use the Projectile Motion Equations). V. i,ball m =1.51- S hable=1.0 m hoop -0.20 m X₁ = ?1106. A projectile is fired with an initial velocity of v. ft per sec upward at an angle of 0° with the horizontal. Find the horizontal distance covered before the projectile returns to its original level. Also determine the maximum height attained by the projectile. v.? sin 2 0 ;h v. sin? 6 2 g Ans. I = %3D 1107 The oon ah
- H.W from this figuer V=49 mbec 9-53 Find 0 the position and magnitude and the Uelacily of the projectile after 2Sec 9 the finme wwhich make this projectile have the max hight- the Range. JoJa SWATWA9:32 O 1 o0 24 A railgun is capable of shooting a projectile at speeds of about 3 000 m/s. A certain scientific railgun used for railgun research is aimed at an angle of 30° from the horizontal. After some time, the projectile hits the ground. The railgun is planted on the ground, so assume that xo = 0 and yo = 0. a. Calculate Vor and voy. b. Calculate the range of the projectile c. From your results in (a) and (b), use the equation for x(t) to calculate the total air time of the projectile. d. From your results in (a) and (c), calculate v̟(t) and v,(t) as it hits the ground. e. From your results in (d), calculate the magnitude of the velocity v of the projectile as it hits the ground. f. From your results in (a) and (d) and using the time-independent equation discussed in Worksheet 9, calculate the maximum height of the projectile. ||3. A baseball player throws a 145g ball toward home-plate from the out-field. The throw was made at 30.0m/s, 30.0° above horizontal [South]. If the baseball player releases the ball 2.45m above the ground; a. Determine the velocity (speed and direction) at the moment the ball strikes the 'turf (ground). b. Determine the time at which the ball possessed a minimal amount of kinetic c. Determine minimum level of kinetic energy for the ball throughout its flight. | energy.
- A TI Yo Ac As Inv Eva Knc need to: 1. Ignore air resistance when answering all parts of this question. a. A golf ball is hit at 60.0° to the horizontal with an initial velocity of 1.50 x 102 ms¹. It lands at the same height from which it is hit. i. Show that the initial vertical velocity of the ball is 1.30 x 102ms¯ (1) 1/2 ii. Find the time of flight of the golf ball. iii. Calculate the range of the ball. KA1 (1) KA2 (3) KA2 (2) b. A baseball is hit at the same angle and initial speed as the golf ball in part a. However, its initial height is 1.3m above the ground. Explain why the baseball will travel further than the golf ball from part a.09:49 1 A O NI 19 l ll 54% A rugby ball is kicked at an angle trom a honzontal ground and returns to the ground level. If the horizontal range of the ball is 180.00 m, and the horizontal component of the ball's velocity at any instant is 25.00 mis, calculate what the initial vertical component of the ball would be. OA9.81 mis OR. 20.00 m's O.35.32 m/s OD.25.00 mis OE 30.00 m/s II3. A projectile is launched at an elevated target with an initial velocity of of vo = 200 m/s in a direction making an angle of 30 degrees from the horizontal. Vo=200 m/s 500 m 30 R a. Determine the time of flight from A to B. b. Determine the range R. c. Determine the impact velocity at the target.
- 7. A projectile is fired horizontally at 9 m/s from a 7.2 m high wall. a. Find its speed when it reaches the ground. b. At what angle does it hit the ground?2. A pool ball rolls off a flat table with a speed of 8m/s. The ball lands 3m from the base of the table. How tall is the table? Ax Vi Vf a At X yWhile standing on the roof of a building, a child tosses a tennis ball with an initial speed of 16 m/s at an angle of 25° below the horizontal. The ball lands on the ground 3.5 s later. How tall, in meters, is the building? m DETAILS OSCOLPHYS2016 3.4.WA.047. MY NOTES ASK YOUR TEACHER A soccer ball, kicked from ground level at an angle of 73.0° above horizontal, is in the air for 4.40 s. What was its initial speed, in m/s, just after it was kicked? Ignore air resistance. m/s