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An arrow is shot at an angle of theta=45 above the horizontal. The arrow hits a tree a horizontal distance D=220m away, at the same height above the ground as it was shot. Use g=9.8 m/s^2 for the magnitude of the acceleration due to gravity
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Question: Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. In the event of an imp ...
A projectile is launched at an angle of 13.0° above the horizontal. What is its initial speed if it hits a target that is located a horizontal distance of 155 m from the launch point and 10.5 m below the launch level?
Question: A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.3 s later. If the speed of sound is 340 m/s, how high is the cliff? The response must be typed, single spaced, must be in tim ...
Question: A particle initially located at the origin has an acceleration of a= 2.00j m/s2 and an initial velocity of Vi = 7.00i m/s. (a) Find the vector position of the particle at any time t (where t is measured in seco ...
Question: A straight wire of length L has a positive charge Q distributed along its length. Find the magnitude of the electric field due to the wire at a point located a distance d from one end of the wire along the line ...
Question: The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 30 m radius of curvature. What is the car's speed at the bottom of the dip? The response must ...
Question: A peregrine falcon in a tight, circular turn can attain a centripetal acceleration 1.5 times the free-fall acceleration. If the falcon is flying at 20 m/s, what is the radius of the turn? The response must be t ...
Problem: A rotating platform of radius R = 4.2cm is initially at rest. It then begins to move, such that a point on its edgeexperiwnces a tangential acceleration of at = 7.5cm/s^2. A) Write an [expression] that gives the ...
Question: A research submarine has a 30.0cm diameter window 8.80cm thick. The manufacturer says the window can withstand forces up to 1.20 x 10 6 N . What is the submarine's maximum safe depth? The pressure inside the su ...
Question: Point charges q1 = +2.00 (mu)C and q2 = -2.00 (mu)C are placed at adjacent corners of a square for which the length of each side is 1.00 cm. Point a is at the center of the square, and point b is at the empty c ...
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