1. Asilver dollar is thrown downward at an angle of 60.00 below the horizontal from a bridge 50.0 m above a river. If its initial speed is 40.0 m/s, where and at what speed will it strike the water? Ignore the effects of the air. (50.8m/s)
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- A basketball player is running at 5.05 m/s toward the basket when he jumps into the air to dunk the ball. He maintains the same horizontal velocity while in the air. What vertical velocity does he need to rise 0.750 m above the floor in m/s?6. A projectile is launched at ground level with an initial speed of 46.0 m/s at an angle of 35.0° above the horizontal. It strikes a target above the ground 2.70 seconds later. What are the x and y distances from where the projectile was launched to where it lands? 7. A ball is thrown horizontally from the top of a 54.0-m building and lands 117.3 m from the base of the building. Ignore air resistance. (Assume the ball is thrown in the +x direction and upward to be in the +y direction.) (a) How long (in s) is the ball in the air? s (b) What must have been the initial horizontal component of the velocity (in m/s)? (Indicate the direction with the sign of your answer.) m/s (c) What is the vertical component of the velocity (in m/s) just before the ball hits the ground? (Indicate the direction with the sign of your answer.) m/s (d) What is the velocity (in m/s) (including both the horizontal and vertical components) of the ball just before it hits the ground? magnitude…A place kicker must kick a football from a point 36.0m (about 40 yards) from the goal, and half the crowd hopes the ball will clear the crossbar, which is 3.05m high. When kicked, the ball leaves the ground with a speed of 20.0m/s at an angle of 53o to the horizontal. a) By how much does the ball clear or fall short of clearing the crossbar? b) Does the ball approach the crossbar while still rising or while falling?
- 2. A child standing at a third story window (25 meters above the ground) throws a baseball at an angle of 30° above the horizontal with an initial velocity of 20 m/s. How far from the building does the ball hit the ground?A cannon is placed on high ground 24 ft above a target that is 1000 ft away horizontally. It fires a projectile upward at a 45° angle with an initial speed of vo ft/s. What value of vo is necessary for the projectile to hit the target? The acceleration due to gravity is g= 32 ft/s2. Select one: a. Vo 150 Ob. Vo V500 с. Vo 100/2 d. Vo 125 2 e. Vo 2501.