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Water skiers often ride to one side of the center line of a boat, as shown in Figure 7-16. In this case, the ski boat is traveling at15 m/s and the tension in the rope is 85N. If the boat does 3500 J of work on the skier in 42.8 m, what is the angle θ among the tow rope and the center line of the boat?
find the tangential and centripetal components of the net force exerted on a car (by the ground) when its speed is 38 m/s, and it has accelerated to this speed from rest in 9.5 s on a curve of radius 370 m. The car's mass is 1000 kg.
The velocity of a plane relative to still air is 135 mr/hr. The pilot wants to fly straught north over the ground. What is the direction of the wind relative to the ground
Planet Z is 1.00x10^4 km in diameter. The free fall acceleration on Planet Z is 5.00 m/s^2. What is the free fall acceleration
A certain camera has f-numbers that range from 1.1 to 28. If the focal length of the lens is 40 mm, what is the range of aperture diameters for the camera
q1. suppose a small metal ball of mass and negative charge. the ball is released from rest at the point and constrained
A lens system consists of two lenses 48.5 cm apart. The first lens is convex (converging) and has a focal length of 25.22 cm. What is the focal length of the second lens
An RLC circuit is used in a radio to tune into an FM station broadcasting at f = 99.7 MHz. The resistance in the circuit is R = 12.4 ?, What capacitance should be used
a parallel-plate air capacitor has a capacitance of 500pf and a charge of magnitude 0.250uc on each plate. the plates
A charge of -3mc is fixed in a place.a particle with mass=7.20*10-3Kg and charge= -8mc is fired toward the fixed charge from initial distance=.450m.if the particles initial speedis 65m/s,how close will the particle get to the fxed charge? you may n..
A 60.0kg skier starts out at the top of a hill from rest and does 2000J of work with his poles while skiing down 2000m to the base 90.0km lower than the top. calculate the average friction force acting on him
Two stars orbit about their common center of mass. One of the stars has mass m1 and moves in a circular orbit at a distance a from the center of mass. What is the ratio of the orbital periods
A car is driven 165 km west and then 95 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
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