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Two bicycle tires are set rolling with the same initial speed of 3.40 m/s along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 psi and goes a distance of 18.2 meter; the other is at 105 psi and goes a distance of 93.8 meter. Suppose that the net horizontal force is due to rolling friction only and take the free-fall acceleration to be g = 9.80 m/s2. Find the coefficient of rolling friction for the tire under low pressure?
A dolphin wants to swim directly back to its home bay, which is 0.760 km due west. It can swim at a speed of 4.23 m/s relative to the water, but a uniform water current flows with speed 2.92 m/s in the southeast direction. What direction should th..
Suppose that unpolarized light of intensity 144 W/m2 falls on the polarizer in the figure below, and the angle ? in the drawing is 28.5°
A 5-kg fish swimming 1 m/s swallows an absentminded 1-kg fish swimming toward it at a speed that brings both fish to a halt immediately after lunch. What was the speed of the smaller fish
A stone is dropped from rest into a well. The sound of the splash is heard exactly 2.00 s later. Find the depth of the well if the air temperature is 14.0°C. meter
A lens is made of a transparent material having an index of refraction of 1.7. One side of the lens is flat, and the otherconvex with a radius of curvature of 28cm.(a) Find the focal length of the lens.
A bubble with a volume of 1.0 cm 3 forms at the bottom of a lake that is 20.0 m deep. The temperature at the bottom of the lake is 10.0 °C. The bubble rises to the surface where the temperature is 25.0 °C. Suppose that the bubble is small sufficient..
A 6650kg iceberg with density 931 {\rm kg/m}^3 is afloat in seawater with density 1030 {\rm kg/m}^3, Find the volume of water displaced by the iceberg
A 7.80 gram bullet moving at 460 m/s penetrates a tree trunk to a depth of 4.4 centimeter. Use work and energy considerations to determine the average frictional force that stops the bullet
You observe that a falling stone takes 0.21 seconds to pass a window that is 1.6 meters tall. What is the speed of the stone as it reaches the bottom of the window
the best rebounders in basketball have a vertical leap that is the vertical movement of a fixed point on their body of
A high-speed photograph of a club hitting a golf ball is shown in the figure below. find the average force exerted on the ball by the club
A rocket with a mass of 5 x 10^5 kg has a total energy that is 6 times its rest energy. What is the relativistic kinetic energy of the rocket
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