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A pile driver drives a post into the ground. The mass of the pile driver is 3,500 kg and it is dropped through a height of 8.0 m on each stroke. If the resisting force of the ground is 4.5 × 106 N, how far is the post driven in on each stroke?
A high-speed lifting mechanism supports a 875-kg object with a steel cable that is 33.0 m long and 4.00 cm2 in cross-sectional area. Determine the elongation of the cable
A person pushes a 16.0-kg shopping cart at a constant velocity of a distance of 26.0 m. She pushes in a direction 20.0degrees below the horizontal. A 54.0 N frictional force opposes the motion of the cart.
A(n) 331 g object is attached to a spring and executes simple harmonic motion with a period of 0.294 s. The total energy of the system is 1.7J. Find the force constant of the spring. (N/m) Find the amplitude of the motion (in cm)
What is magnitude of the gravitational attraction
What is the bound charge on the surface of the cavity? Is this result consistent with the total bound charge being zero?
A very long solenoid of circular cross section with radius r= 4.20cm has n= 90.0 turns/cm of wire. What is the magnitude of the force on the electron
Five people are playing tug-of-war. Anders and alyson pull to the right with 44 N and 34 N, correspondingly. Calid and Marisol pull to the left with 55 N and 35 N, respectively. With what force and in what direction does Benito pul of the game is tie..
You throw a ball with a speed of 25m/s at an angle of 40.0° above the horizontal directly toward awall. What are the horizontal and vertical components of its velocity as it hits the wall
A 325-N force accelerates a 50.0-kg crate from rest along a horizontal frictionless surface for a distance of 20.0 m as shown in the figure. How much work is done on the crate? What is the final speed of the crate?
A 1.93kg block is placed against a compressed spring on a frictionless 27degree incline. How far up the incline will the block go before coming to rest
The distance between two successive minima of a transverse wave is 2.57 m. Five crests of the wave pass a given point along the direction of travel every 12.4 s. Find the frequency of the wave
A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark. What is the runner's speed (in m/s)
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