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A quarterback claims that he can throw the football a horizontal distance of 183 m (200 yd). Furthermore, he claims that he can do this by launching the ball at the relatively low angle of 25° above the horizontal. To evaluate his claim, determine the speed with which this quarterback must throw the ball. Assume that the ball is launched and caught at the same vertical level and that air resistance can be ignored. For comparison, a baseball pitcher who can accurately throw a fastball at 45 m/s (100 mph) would be considered exceptional.
A puck slides on a surface for 5.6 m before it stops. If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is the force of friction exerted on the puck
A 54.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 10-8 ·m, What must be the diameter of the wire
Suppose that the speed of the water in the reservoir is zero, and that the water flow is steady. Overlook both air resistance and the height difference between the reservoir and the muzzle.
a child attempts to kick a ball over a wall 5.0 m tall 30.0 m away. if the child kicks the ball with an inital velocity
An infinitely long cylinder, radius a, carries a current I, distributed uniformly over its cross-sectional area. The axis of the cylinder coincides with the z-axis.
An 85 kg man lowers himself to the ground from a height of 5.6 m by holding onto a rope that runs over a frictionless pulley to a 75 kg sandbag
q1. a 485 kg sailboat has an acceleration of 0.50 ms2 at an angle of 51deg north of east. find magnitude and direction
An ultracentrifuge having a diameter of 16.3 cm produces an extremely large acceleration of 4.41E+5 m/s2. What is the angular speed of the centrifuge
A sample of an ideal gas is at a temperature of 320 K. The rmsmolecular speed at this temperature is measured as 1631 m/s. Calculate the mass of a molecule of this gas.
A 0.25 kg puck is initially stationary on an ice surface with negligible friction. At time t = 0, a horizontal force begins to move the puck. The force is given by F= (12.0 - 3.00t^2)i, with F in newtons and t in seconds, and it acts until its mag..
A metal ball bearing 1.0 cm above the bead feels a 0.035 N downward electric force, What is the charge on the ball bearing
A surfer is zipping northeast across the river with a velocity of 10 m/s relative to the water. what is the true velocity of the surfer
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