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In shot putting, many athletes elect to launch the shot at an angle that is smaller than the theoretical one (about 42 degrees) at which the distance of a projected ball at the same speed and height is greatest. One reason has to do with the speed the athlete can give the shot during the acceleration phase of the throw. Assume that a 7.260 kg shot is accelerated along a straight path of length 1.650 m by a constant applied force of magnitude 380.0 N, starting with an initial speed of 2.500 m/s (due to the athlete's preliminary motion). What is the shot's speed at the end of the acceleration phase if the angle between the path and the horizontal is (a) 30.00 degrees and (b) 42.00 degrees? (Hint: treat the motion as though it were along a ramp at the given angle) (c) by what percent is the launch speed decreased if the athlete increases the angle from 30.00 degrees to 42.00 degrees?
A 250g , 30.0-cm-diameter turntable rotates on frictionless bearings at 62.0 rpm . A 22.0 g block sits at the center of the turntable. A compressed spring shoots the block radically outward along a frictionless groove in the surface of the turntable...
A discus thrower accelerates a discus from rest to a speed of 24.9 m/s by whirling it through 1.22 rev. Calculate the final angular speed of the discus
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, What is the orbital speed of the second satellite?
The conduction electrons in a metal can be considered for some purposes as an ideal gas. Find the beam current in amperes
A child and sled with a combined mass of 49.0 kg slide down a frictionless slope. what is the height of the hill
A merry-go-round with moment of inertia of 550 kg m 2 has a boy of mass 45 kg riding in the center of the merry-go-round with an initial angular velocity of 9 revolutions per minute. The boy then travels from the center to the outside rim of the m..
You are given a parallel plate capacitor that has plates of area 4.00 m2 which are separated by 0.0100 mm of nylon, Calculate what the applied voltage in kV should be for this capacitor
A 0.04 kg bullet collides in elastically with a 0.5 kg ballistic pendulum. Before the collision the pendulum was at rest but immediately after collision the pendulum is moving with speed of 13.6 m/s. How fast was the bullet travelling before the coll..
Two steel guitar strings have the same length. String A has a diameter of 0.60mm and is under 440.0N of tension. Find the ratio of the wave speeds, VA / VB, in these two strings
Suppose you are driving in the High Sierras from Mammoth Mountain to the Owens Valley 2038 m below. what would be your approximate final speed
Suppose that you hear a clap of thunder 15.5 s after seeing the associated lightning stroke. How far are you from the lightning stroke
Light of wavelength 580nm illuminates a diffraction grating. The second-order maximum is at angle 41.5 degrees
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