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In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. The horizontal distance between the buildings is 32.0 m, and the heights of the Jackson and Walton buildings are, respectively, 13.0 m and 21.0 m. The first balloon launched y the Jackson team hits Walton dorm 2.20 s after launch, striking it halfway between the ground and the roof. Ignore air resistance. (a) Find the direction of the balloon's initial velocity. Give your answer as an angle (in degrees) measured above the horizontal. (b) A second balloon launched at the same angle hits the edge of Walton's roof. Find the initial speed of this second balloon.
A 92-kg fullback, running at 5.0 m/s, attempts to dive directly across the goal line for a touchdown. What is the velocity of the football players after the collision
An object is placed farther from a converging lens than twice the lens' focal length. Draw a ray diagram to determine the nature of the image and describe it
A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +44.0 cm. How far behind the concave lens should the film be placed
A small steel ball with a mass of 80 g is releasesd from a resting height of 1.25 m above a ridgid metal plate. What is the velocity of ball before impact.
In the figure below, the converging lens' focal length is 13 cm, d = 18 cm, and the diverging lens' focal length is -12.6 cm, How tall is the image formed by the diverging lens
A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. obtain the wavelength of the monochromatic light
What fraction of incident intensity is transmitted by system
Agent Arlene devised the following method of measuring the muzzle velocity of a rifle. She fires a bullet into a 4.600-kg wooden block resting on a smooth surface, What is the speed v of the bullet
Two capacitors are connected in parallel across the terminals of a battery. One has a capacitance of 2.0 µF, What is the voltage of the battery
a model rocket is shot straight up. shortly running out of fuel, the upward thrust on the rocket is 2 N, calculate the mass of the rocket
A car with 60 cm diameter tires is traveling at a constant speed of 100 km/hr. What is the angular velocity of the tires in rad/s
If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 2.2 m on Earth, what would be his maximum range on the Moon, where free-fall acceleration is g/6 and g = 9.80m/s2.
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