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Question: The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net. Suppose that you loft the ball with an initial speed of 15.0 m/s at an angle of 50.0° the horizontal. At this instant your opponent is 10.0 m away from the ball. He begins moving away from you 0.46 s later, hoping to reach the ball and hit it back at the moment that it is 2.10 m above its launch point.
Part A: With what minimum average speed must he move?
I need help to determine with what minimum average speed must he move.
A solid iron cylinder (d = 5 cm, L = unknown, SG is on the sheets) is falling inside a tube with constant velocity 9.77 m/s. The gap is 1 mm, it is filled with lubricant oil. What is the oil viscosity (in Pa·s)? Compute shear rate as we did in the ca..
A 2.3cm high object is located 30cm from a diverging lens, whose focal length is 14cm. What is the height of the image produced by the lens
Find A (Vector potential of the Magnetic dipole) on a diagonal of a square side S and of current I at a distance Sqrt(2)S from the corner.
If a satellite orbits very near the surface of a planet with period T, derive an algebraic expression for the density (volume/ mass) of the planet. Express your answer in terms of the variable T and the gravitational constant G.
A hollow, conducting sphere with an outer radius of 0.240 m and an inner radius of 0.197m has a uniform surface charge density of +6.35×106 C/m2. Calculate the strength of the electric field just outside the sphere
Suppose you have a circuit consisting of a resistance R = 54 ?, an inductor with L = 36.4 mH and internal resistance r = 30 ?, What is the frequency of the damped oscillations of this circuit
You are driving home from school steadily at 80 for 150. It then begins to rain and you slow to 50. You arrive home after driving 3 hours and 20 minutes.
question a wire 2.80m in length carries a current of 5.00 a in a region where a uniform magnetic field has a magnitude
A child is riding a merry-go-round, which has an instantaneous angular speed of 1.25 rad/s and an angular acceleration os 0.745 rad/s^2. What angle does the acceleration of the child make with the tangential direction
A 35 millimeter camera equipped with a 105 millimeter focal length lens is used to photograph a tree 19 meter tall. Find the required distance, between the tree and the camera to take the photograph
two trains a and b are approaching each other. the observer is in train a which is going west at 40 miles per hour.
Estimate the amount of energy that is wasted each day in Europe due to an additional inefficiency of 5% (on top of the thermodynamic efficiency) from cars that are not lubricated properly. how far Europeans drive each day
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