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You are watching Olympic athletes practicing archery when you wonder how fast an arrow is shot from a bow. With a flash of insight you remember your physics and see how you can easily determine what you want to know by a simple measurement. You ask one of the archers to pull back her bowstring as far as possible and shoot an arrow horizontally. The arrow strikes the ground at an angle of 86 degrees from the vertical at a distance of 100 feet from the archer. What is the answer to your query?
A person drives a car around a circular cloverleaf with a radius of 64 m at a uniform speed of 10 m/s. What is the acceleration of the car
A block of mass m = 3.07 kg is attached to a spring (k = 29.3 N/m) by a rope that hangs over a pulley of mass M = 6.14 kg and radius R = 8.81 cm. find the maximum extension of the spring
A vacuum cleaner is plugged into a 120.0-V socket and uses 4.1 A of current in normal operation, Find the coil resistance of the motor
A girl jumps on bike and exerts torque of 25.0 N-m perpendicular to the pedal. Moment of inertia of bike wheel is I = 0.045kg-m^2. What is angular velocity of bike wheel at end of this time
a hot air balloon is rising upward with a constant speed of 15 ms. when the balloon is 5 m above the ground the
At t=0 a grinding wheel has an angular velocity of 30.0 rad/s. It has a constant angular acceleration of 31.0 rad/s^2 until a circuit breaker trips at time t = 2.00 s. From then on, it turns through an angle 428 rad as it coasts to a stop at constant..
A 130 lb subject did 33 lifts/min up a 30 cm step for 5 minutes, what was the work rate, power output and what was the total work done
Two 1.5 g spheres are charged equally and placed 1.6 cm apart. What is the magnitude of the charge on each sphere
a uniform electrical field is established by connecting the plates of a parallel-plate capacitor to a 11v battery. the
A 1.80Kg brick is sliding next to on a rough horizontal surface at 13.5m/s .If the brick stops in 4.80, how much mechanical energy is lost.
A baloon 1.2 g when empty has volume 800 cm ^3 and is filled with helium. density of air is 1.29 kg/m^3 while that of helium is .179 kg/m, calculate acceleration of balloon
The electric potential at a position located a distance of 21.0 mm from a positive point charge of 6.90×10-9C, Calculate the value of the second charge
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