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A boy 10.5 m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the instant the ball is thrown. If the boy throws the ball horizontally at 8.50 m/s.
A. How fast must the dog run to catch the ball just as it reaches the ground?
B. How far from the tree will the dog catch the ball?
A pendulum of length 2.0 m is held out to point A
An adult exerts a horizontal force on a sewing that is suspended by a rope of length L, holding it at an angle x with the vertical. The child in the swing has a weight W and dimensions that are negligible compared to L.
A 12-kg box is free from the top of an incline that is 5.00m long and makes an angle of 40 degrees to the horizontal. A 60-N friction force impedes the motion of the box.
A point charge of +5.34 ?C is located at the center of a sphere with a radius of 12.6 cm. Determine the electric flux through the surface of the sphere.
If the asteroid fragment contains carbon, it may burn when entering Earth's atmosphere. Which type of chemical bond would result from this process
A computer hard disk starts from rest, then speeds up with an angular acceleration of 200.0 rad/s2 until it reaches a final angular speed of 7300.0 rpm. How long does it take for the disk to reach this angular speed
q1. if the four-engine jet accelerates down the runway at 4 ms2 and one of the jet engines fails how much acceleration
A helicopter is ascending vertically with a speed of 5.30{rm m/s}. At a height of 120 {rm m} above the Earth, package is dropped from a window.
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of -1.0799 N when separated by 50 cm, center-to-center. What were the initial charges on the spheres
An object is 17 mm in front of a converging lens, and the image is 3 mm behind the lens. What is the focal length of the lens? Reply In mm
A copper wire and an aluminum wire of the same length have the same resistance. What is the ratio of the diameter of the copper wire to that of the aluminum wire
question1at one instant a bicyclist is 40.0 m due east of a parks flagpole going due south with a speed of 10.0 ms.
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