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At the Science Olympiad competition, a group of middle school students uses a trebuchet that launches a tennis ball from a height h above the ground with a speed of 11.33 m/s and initial angle of 36.73° with respect to the horizontal. The tennis ball covers a horizontal distance of 14.014 m before it hits the ground. At what height h above the ground was the tennis ball launched?
An insect with many legs is scuttling across the floor. Assume that each leg pushes with the same force at exaclty the same spot. What is the insects acceleration in terms of gravity
A bat hits a moving baseball. If the bat delivers a net eastward impulse of 0.8 N-s and the ball starts with an initial horizontal velocity of 5.0 m/s to the west, what is the mass of the ball
Two people carry a heavy electric motor by placing it on a light board 2.60 m long. What is the weight of the motor in this case
An instructor wants to use a lens to project a real image of a light bulb onto a screen 2.20 m from the bulb. In order to get the image to be three times as large as the bulb, what focal length lens will be needed?
A transparent oil with index of refraction 1.19 spills on the surface of water (index of refraction 1.33), producing a maximum of reflection with normally incident green light (wavelength 500 nm in air). Assuming the maximum occurs in the first order..
Light with a wavelength of 618 nm passes through a slit 7.52 wide and falls on a screen 1.88 m away. compute the linear distance on the screen from the central bright fringe to the first bright fringe above it.
a child pulls an 15 kg- wagon with a horizontal handle whose mass is 1.9 kg accelerating the wagon and handle at 2.5
A 10cm long animal tendon was found to stretch3.8mm by a force of13.0N. Calculate the elastic modulus of this tendon
A model rocket rises with constant acceleration to a height of 3.8 , at which point its speed is 26 m/s How much time does it take for the rocket to reach this height.
A guitar string with a mass of 10.0 g is 1.00 m long and attached to the guitar at two points separated by 61.6 cm. find the frequency of the replacement string's first harmonic
a 1000kg car experiences a total power of 150hp (horsepower) if it starts from rest what is the magnitude of the velocity of the car in miles per hour 10s later
A new circus act features a large frictionless cannon with an 2500 N/m spring mounted at the bottom of a long barrel which makes an angle of 37.0o with the horizontal. Find the speed of the acrobat when he reaches the top of the barrel. Use energy ..
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