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Calculate the magnitude of the force if the man pushes parallel to the incline and if the man pushes parallel to the floor.
A bicycle and its rider together has a mass of 86 kg. What power output of the rider is required to maintain a constant speed of 3.6 m/s (about 8.1 mph) up a 5.0% grade (a road that rises 5.0 m for
The crate lies on a plane tilted at an angle = 29 to the horizontal, with = 0.15. the height of the incline is 8.15 m. Determine the acceleration of the crate as it slides down the plane.
A man of mass 79.5 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 24.1 kg and is 2.4 m long. Suppose the man stands to the right from the middle of the
He explains that the phenomenon is happening. Explain. Calculate the vertical distance between two consecutive receiver positions corresponding to two maxima.
A pendulum consists of an object of mass 4.42 kg that hangs at the end of a massless bar, a distance 1.68 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivo
After a fourth unmeasured displacement, she finds herself back where she started. Determine the magnitude of the fourth displacement.
A probe, 2A above a gold surface, consists of a double tip, with a second atom 0.25A higher than the lowest atom (which is the one 2A above the surface) gives a ‘ghost' image displaced from th
The soldier does 121 J of work in the process setting the bow/arrow combination and then releases the arrow. What is the speed of the arrow?
Assume the mass hanger is about 5g. How much mass will you need to add to the mass hanger in order to get a total single mass hanger system equal to 150 grams?
To store the energy produced in 1.0 hour by a 140 electric-power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir?
A Ford Mustang can accelerate from 0 to 60 in a time of 5.4 . A Mini Cooper isn't capable of such a rapid start, but it can turn in a very small circle 35 in diameter. How fast would you need to dri
You have a mass of 98 kg and are on a 55-degree slope hanging on to a cord with a breaking strength of 154 newtons. What must be the coefficient of static friction to 2 decimal places between you a
The disk will slide off the turntable if it is located at a radius larger than 18 cm from the axis of rotation. What is the coefficient of static friction?
How much time does she have to run the last 1750 m? (b) What should be her average speed over the last 1750 m in order to finish with an overall average speed of 3.85 m/s?
A rifle with a barrel length of 63 cm fires a 12 g bullet with a horizontal speed of 450 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 15 cm.
A pendulum of length 130 cm swings with an amplitude of 2.3 cm. Its mechanical energy is 5.2 mJ. What is the mechanical energy of the same pendulum when it swings with an amplitude of 4.4 cm? Answe
A solid piece of copper and a solid piece of aluminum have the same mass. If the density of copper is 8.9 grams/cm3 and the denity of aluminum is 2.7 grams/cm3,
A 70-g ball collides elastically with a 320-g ball that is at rest. If the 70-g ball was traveling in the positive x-direction at 5.75 m/s before the collision, what are the velocities of the two b
At what angle from vertical must she lean? Since the radius of the curve is much greater than the height of the passenger, neglect torques. 1 mile = 5,280 ft.
Pin joints and the masses of the bars are small compared with the mass of a 1360 kg car at the center. Calculate the force of tension or compression in each structural component.
What is the maximum reaction time allowed if the ranger is to avoid hitting the deer?
Find the shear strain that results if a force of magnitude 1.20×106 is applied to the top square face of the plate, parallel to the side.
A rifle with a barrel length of 55 cm fires a 12 g bullet with a horizontal speed of 350 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 11 cm. How long does it take the bulle
You measure the sound intensity as 1.47×10^-7 W/m2. Another student is 4.79 m away from the talkers. What sound intensity does the other student measure?