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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.
Two wheels have the same mass and radius of 4.1 kg and 0.38 m, respectively. Find the net external torque that acts on each wheel
The 65.0 kg climber in the figure is supported in the "chimney" by the friction forces exerted on his shoes and back. What is the minimum normal force he must exert
It is 150 cm from your eyes to your toes. You are standing 196 cm in front of a tall mirror. How far is it from your eyes to the image of your toes.
A man with mass m1 = 61.0 kg stands at the left end of a uniform boat with mass m2 = 169.0 kg and a length L = 2.7 m. At what location does the man end up
The tires of a car make 62 revolutions as the car reduces its speed uniformly from 90km/h to 40km/h . The tires have a diameter of 0.86m. What was the angular acceleration of the tires
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach base camp
After being accelerated to a speed of 1.76×105m/s , the particle enters a uniform magnetic field of strength 0.800T and travels in a circle of radius 35.0cm, Find the ratio m/q for this particle
What is the Carnot efficiency of a heat engine operating between the temperatures of 300 degrees C (573 K) and 100 degrees C (373 K)
define the speed with which the cart reaches positions 3, 2, and 1 (in that order). Neglect friction. Let g = 9.81 m/s2.
In coming to a stop, a car leaves skid marks 77m long on the highway. Assuming a deceleration of 8m/s2, estimate the speed of the car just before braking.
Light propagates from soda lime glass (n=1.518) into a new material (n= ?). Determine the index of refraction for the material
Two uniform infinite sheets of electric charge densities 18.0 C/m2, Find the magnitude of the electric field everywhere
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