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A football is thrown at a speed of77 mph at a wall that is 52 ft away. Upon colliding with the wall thefootball exerts 43 lb of force due north onthe wall. How much force does the wall exert on the football and in what direction?
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Quesiton: A rock is tossed straight up with a velocity of 20m/s When it returns, it falls into a hole 10 m deep. What is the rock's velocity as it hits the bottom of thehole? How long is the rock in the air, from the ins ...
A cogeneration power plant uses waste wood from the forest industry to generate heat and electricity for a nearby industrial park. It has a capacity to burn 80 MW of wood as thermal power. If the thermal power production ...
Question: In a physics laboratory experiment, a coil with 230 turns enclosing an area of 12.1 cm2 is rotated during the time interval 4.10Ã-10?2 s from a position in which its plane is perpendicular to Earth's magnetic f ...
What are (a) the x component, (b) the y component, and (c) the z component of if r=a-b+c if a =8.0i+6.0j-3.3k, b=-5.5i+4.5j +6.0k and c=1.1i+5.6j+6.3k. (d) Calculate the angle between and the positive z ...
A mass m is projected vertically upwards at t = 0 from y = 0 with initial velocity v0 > 0 along the y-axis. (+y is upwards) The mass moves under the constant force of gravity, and also a force of air resistance with magn ...
A hunter wishes to cross a river that is 1 km wide and that flows with a speed of 3 km/h. The hunter uses a small powerboat that moves at a maximum speed of 11 km/h with respect to the water. What is the time necessary f ...
Question: A rocket is launched straight up from the earth's surface at a speed of 1.80×104 m/s. What is its speed when it is very far away from the earth? The response must be typed, single spaced, must be in times new r ...
Question: A scalloped hammerhead shark swims at a steady speed of 1.0 m/s with its 80 -cm-wide head perpendicular to the earth's 56 Â µT magnetic field. What is the magnitude of the emf induced between the two sides of t ...
Question: A solenoid 4.00 cm in diameter and10.0 cm long has 500 turns and carries a current of 15.0 A. Calculate the magnetic flux through the circular cross-sectional area of the solenoid. The response must be typed, s ...
Question: Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride. If a boat and its riders have a mass of 800kg and the boat drifts in at 1.4m/s how much work does Sam do to stop it ...
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