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A boat with a horizontal tow rope pulls a water skier. She skis off to the side, so the rope makes an angle of 13.0 degrees with the forward direction of motion. If the tension in the rope is 200 N, how much work does the rope do on the skier during a forward displacement of 270m?
A pendulum consists of a mass m suspended from a fixed point by means of a string of length b and is immersed in a viscous medium. Find its velocity and angular displacement at a later time
An ultralight plane and pilot have a total mass of 150 kg. what is the net force acting on the plane and pilot
The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. Explain by how much does the rocket clear the top of the wall?
Future space stations will create an artificial gravity by rotating. What rotation period will provide "normal" gravity
A vented tank of large cross-sectional area has a horizontal pipe .12m in diameter at the bottom. The tank holds a liquid whose density is 1500 kg/m^3 to the height of 4.0 m.
a 500 g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle the tension in the string is 15 N. What is the speed of the ball at that point?
High speed stroboscopic photographs show that the head of a 246 g golf club is traveling at 56.2 m/s just before it strikes a 47.0 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
A sled weighing 61.0 N is pulled horizontally across snow so that the coefficient of kinetic friction between sled and snow is 0.100. A penguin weighing 67.0 N rides on the sled, as in the figure below. If the coefficient of static friction between p..
Two metal conductors that are separated by a distance of 0.89 mm. When an electric spark jumps between them, What is the magnitude of the potential difference
Two charges, +e and -e, are a distance of 0.870 nm apart in an electric field, E, that has a magnitude of 3.09 kN/C, Calculate the torque on the dipole in the electric field
A sound wave from a police siren has an intensity of 103.1 W/m2 at a certain point; find the intensity level of the sound wave due to the ambulance?
A rock is dropped into an abandoned mine, and a splash is heard 4s later. how fast the rock was falling when it hit the water
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