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A 1150 kg car rolling on a horizontal surface has speed v = 50 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2 m. What is the spring stiffness constant of
A 0.05kg arrow is fired from 1.5m above the ground at an angle of 35deg. If the bow is pulled back 0.95m and has a spring constant of 450N/m, does the archer get a bull's-eye if the target is 775m a
The 1.5 kg ball is pulled back to a height of 0.7 m above its hanging position and then allowed to swing back down toward the 1.1 kg ball. a) Calculate the period of oscillation of the 1.5 kg ball i
Now from the origin draw vectors to represent both the initial and final positions and a vector that gives the displacement vector.
A charge of 120 µC is at the center of a cube of edge 80.0 cm. No other charges are nearby. (a) Find the total flux through each face of the cube. (b) Find the flux through the whole surface of
If the capillaries of an average adult were unwound and spread out end to end, they would extend to a length over 40 000 mi. If you are 1.65 m tall, how many times your height would the capillary le
When a standing wave exists on a string, the vibrations of incident and reflected waves cancel at the nodes. What does this mean? Is the energy destroyed?
A small ball rolls horizontally off the edge of a tabletop of height h. It strikes the floor a distance x horizontally away from the edge of the table. (a) How long is the ball in the air? (b) What
At what horizontal distance from the firing point does it strike the ground? What is the magnitude of the vertical component of its velocity as it strikes the ground?
(a) Does the ball clear a 8.91-m-high fence that is 101 m horizontally from the launch point? (b) At the fence, what is the distance between the fence top and the ball center?
An Earth satellite moves in a circular orbit 915 km above Earth's surface with a period of 103.1 min. What are (a) the speed and (b) the magnitude of the centripetal acceleration of the satellite?
What is the (a) magnitude and (b) direction of the boat's velocity relative to the ground? Give the direction as the angle of the velocity from due north, positive if to the east and negative if to
An astronaut is rotated in a horizontal centrifuge at a radius of 7.5 m. (a) What is the astronaut's speed if the centripetal acceleration has a magnitude of 5.6g? (b) How many revolutions per minut
A jogger runs 100 m due west, then changes direction for the second leg of the run. At the end of the run, she is 175 m away from the starting point at an angle of 15.0 degrees north of west. What w
A 1600 kg car is pulling a 375 kg trailer. Together, the car and trailer have an acceleration of 2.15 m/s2 directly forward. (a) Determine the net force on the car.
A golf ball is dropped from rest from a height of 9.30 m. It hits the pavement, then bounces back up, rising just 5.80 m before falling back down again. A boy then catches the ball when it is 1.00 m
A Person stands at the base of a hill that is a straight incline making an angle phi with the horizontal. For a given initial speed v0, at what angle theta should objects e thrown so that the distan
A 3.81-kHz tone is being produced by a speaker with a diameter of 0.217 m. The air temperature changes from 0 to 29.8 oC. Assuming air to be an ideal gas, find the change in the diffraction angle .
A 15 kg mass starts from rest and slides down an inclined plane 8.0 x 10-1 m long in 0.7 s. What net force is acting on the mass along the incline?
A ball has a mass of 0.5kg. dropped from a cliff top, the ball hits the sea below at a speed of 10./s. a) what is the kinetic energy of the ball as it is about to hit the sea?
A particle of charge +18 µC and mass 5.00 x 10-5 kg is released from rest in a region where there is a constant electric field of +360 N/C. What is the displacement of the particle after a tim
The string has a linear mass density of 0.01 kg/m, and the tension in the string is supplied by a mass hanging from one end. If the string vibrates in its third harmonic, calculate the following
If the string is displaced 1.90 mm at its midpoint and released to produce this note, what are the wave speed, v, and the maximum speed, Vmax, of the midpoint of the string?
A cylinder with a movable piston contains gas at a temperature of 27 degrees celsius, a volume of 1.50m3, and an absolute pressure of .200x10^5 Pa. What will be its final temp if the gas is compress
The generator at a power plant produces AC at 48,000 V. A transformer step this up to 345,000 V for transmission over power lines. If there are 1000 turns of wire in the input coil of the transforme