9. If a projectile (such as a bullet) is fired into the air with an initial velocity v at an angle of elevation of 0 (see the figure), then the height h of the projectile at time t is given by h = - 1612 + vtsin 0 (t, ()
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- Current Attempt in Progress In the figure, particle A moves along the line y = 31.4 m with a constant velocity of magnitude 2.89 m/s and directed parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with zero initial speed and constant acceleration a of magnitude 0.434 m/s2. What angle between a and the positive direction of the y axis would result in a collision? A B 0 XProfessional 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?A small metal ball is fired down from the edge of a lab table at an angle of 0 = 40° below the horizontal. What are the initial x and y components of the velocity of the ball if the muzzle velocity of the cannon from which it was launched is 4 ? %3D m |
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