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The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground some distance away. The world record for the horizontal distance is 86.75 m, achieved in 1986 by Yuriy Sedykh. Ignore air resistance and the fact that the ball was released above the ground rather than at ground level. Furthermore, assume that the ball is whirled around a circle that has a radius of 2.27 m and that its velocity at the instant of release is directed 54.2 ° above the horizontal. Find the magnitude of the centripetal force acting on the ball just prior to the moment of release.
A man observes snow falling vertically when he is at rest, but when he runs through the falling snow at a speed of 5.50 m/s, Find the speed of the snow relative to the earth
Late one night on a highway, a car speeds by you and fades into the distance, How far away from you is this car when its taillights appear to merge into a single spot of light because of the effects of diffraction
In outer space, there are two planets that are separated by a distance of 345x10^8 km. These two planets have the extact same mass. What is the mass of each star when it takes 8.9 earth years to complete one orbit
A 143 O lamp, a 29 O electric heater, and a O 53 fan are connected in parallel across a 135 V line. What power is expended in the heater
As measured in Earth rest frame, a spaceship traveling at 0.964c takes 10.0 years to travel between planets. How long does the trip appear to take for someone on the spaceship
A horizontal spring is lying on a frictionless surface. One end of the spring is attached to a wall, What is the speed of the object at the instant when the spring is stretched by0.042 m relative to its unstrained length
An Airbus A310 is initially moving down the runway at 4.5 m/s preparing for takeoff. The pilot pulls on the throttle so that the engines give the plane a constant acceleration of 1.6 m/s2
Use work and energy to calculate the stopping force on an egg ( we will model it as an spherical object) that is dropped form a height of 2m
Using the Bohr model what is the radius of the electron orbit in the Hydrogen atom when the electron is in the n = 9 state? What is the energy of the Hydrogen atom
question1an unmarked police car travelling a constant 93 is passed by a speeder. accurately 1.20 s after the speeder
Light is incident on a piece of flint glass (n=1.66) from the air in such a way that the angle of refraction is exactly half the angle of incidence. What are the values of the angles of incidence
A block rides on a piston that is moving vertically with simple harmonic motion. If the SHM has period 4.7 s, at what amplitude of motion will the block and piston separate
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