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In the 1994 movie Speed, a bus wired with explosives must maintain a speed of 50mph or the bus will explode. In one of the movie's climactic scenes, the bus jumps a 50 ft. gap in the freeway. If the bus speeds up to 70mph before reaching the gap, what is the minimum launch angle required for the jump to be successful? Does the movie portray the physics adequately? You will probably need ti use the following trig identity: 2sin(theta)cos(theta)=sin2(theta).
This problem introduces the concept of tension. The instance is a rope, oriented vertically, that is being pulled from both ends. Let and (with u for up and d for down) represent the magnitude of the forces acting on the top and bottom of the rope..
During a fun run a girl runs for 12 s moving 2.7 m/s. She then accelerates at 0.5 m/s^2 over the next 25 m. What distance did she cover during the entire period
A unit of area, often used in measuring land areas, is the "hectare", defined as 104m2. An open-pit coal mine consumes 66hectares of land, down to a depth of 23m, each year. What volume of earth, in cubic kilometers, is removed in this time.
You are 1.5 m tall and you are standing 2.0 m away from a flat mirror. The Top of the mirror is at the same level as the top of your head. How large is the mirror
A large oak tree produces 2.2 metric tons of wood over a 50 year growth lifespan. find the tree's efficiency for converting solar energy to wood heating value
An object of mass 1.0kg is attached to a spring with spring constant 15 N/m. what is the amplitude of oscillation
An electric power station is producing 1.60 × 103 W of power that is to be sent to a small town located 13 km away, Find the power lost in heating the wires
An object starts from rest at time t = 0.00 s and moves in the +x direction with constant acceleration. compute the acceleration of the object
When on the ground, Ian's weight is measured to be 692 N. When Ian is on an elevator, his apparent weight is 796 N. What is the net force on the system
A 200 pF capacitor is charged to 120 V, Calculate the maximum energy stored in the magnetic field of the inductor as the circuit oscillate
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. If the ball was moving horizontally when it was caught, how fast was the ball travelling
A positron is an antimatter particle identical in mass to an electron but with a positive charge, Calculate the energies of the three lowest states of positronium
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