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11. A ball is thrown from a point 1 meter above the ground. The initial velocity of 19.6 m/s at an angle of 30 degree above the horizontal.calculate the speed of the ball at the highest point in the trajectory?
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- A boy throws a baseball onto a roof and it rolls back down and off the roof with a speed of 3.75 m/s. If the roof is pitched at 35.0 below the horizon and the roof edge is 2.50 m above the ground, find (a) the time the baseball spends in the air, and (b) the horizontal distance from the roof edge to the point where the baseball lands on the ground.A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0° above the horizontal at a location where g = 10.0 m/s2. What is the horizontal component of its velocity after 4 seconds?1) A cannonball is shot with an initial speed of 30.0 m/s and 25.0º angle above horizontal from a height of 12.0 m. How far can the cannonball go horizontally when it lands on the ground, in meters? Use g = 10.0 m/s2
- 3. A player from team A was awarded two free throws. On the first attempt, he released the ball with a velocity of 6.0 m/s at 45° above the horizontal from a height of 2.0 m from the floor. (a) Is this a miss? (b) For the second attempt, the player shoots at 45° from the same point. What must be the initial speed of the ball so that it will go through the basket? The basket is 4.21 m from the free throw line and 3.05 m above the floor.18. A horizontal rifl e is fi red at a bull’s-eye. The muzzle speed of the bulletis 670 m/s. The gun is pointed directly at the center of the bull’s-eye, but the bullet strikes the target 0.025 m below the center. What is the horizontaldistance between the end of the rifl e and the bull’s-eye?9- A ball is thrown from a point 1.0 m above the ground. The initial velocity is 19.6 m/s at an angle of 30.0° above the horizontal. (a) Find the maximum height of the ball above the ground. (b) Calculate the speed of the ball at the highest point in the trajectory?
- 4. A pitcher throws a ball from the pitchers mound to home' plate 60.5 ft away. If the ball is released horizontally from a height of 7.0 ft above the ground, with a speed of 95 mph, how high will the ball be when it crosses home plate?An arrow is shot from a height of 1.5 m toward a cliff of height H. It is shot with a velocity of 30 m/s at an angle of 60° above the horizontal. It lands on the top edge of the cliff 4.0 s later. (a) What is the height of the cliff? (b) What is the maximum height reached by the arrow along its trajectory? (c) What is the arrow's impact speed just before hitting the cliff?A ball is thrown straight upward and returns to the throwers hand after 3.00 s in the air. A second ball thrown at an angle of 30.0 with the horizontal reaches the same maximum height as the first ball, (a) At what speed was the first ball thrown? (b) At what speed was the second ball thrown?
- A basketball player is running at 5.00 m/s directly toward the basket when he jumps into the air to dunk the ball. He maintains his horizontal velocity. (a) What vertical velocity does he need to rise 0.750 m above the floor? (b) How far from the basket (measured in the horizontal direction) must he start his jump to reach his maximum height at the same time as he reaches the basket?A home run is hit in such a way that the baseball just clears a wall 21 m high, located 130 m from home plate. The ball is hit at an angle of 35 to the horizontal, and air resistance is negligible. Find (a) the initial speed of the ball, (b) the time it takes the ball to reach the wall, and (c) the velocity components and the speed of the ball when it reaches the wall. (Assume the ball is hit at a height of 1.0 m above the ground.)By throwing a ball at an angle of 45, a girl can throw the ball a maximum horizontal distance R on a level field. How far can she throw the tame ball vertically upward? Assume her muscles give the ball the same speed in each case. (Is this assumption valid?)
