What is the magnitude of the net force on the block
A force of 70 N exerted at an angle of 30 degrees below the horizontal on a block of mass 8 kg that is resting on a table. What is the magnitude of the net force on the block in the x direction if the coefficient of kinetic friction is 0.1?
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A 1250kg is pulling a 325kg trailer. Together the car and trailer have an acceleration of 2.15m/s squared. Determine the net force on the car-trailer combination.
A steel tank contains a large quantity of compressed air. When the tank is submerged for an hour in a cold-water tank, the air loses 245 J of heat to the water. What is the change in the internal energy of the air?
A material contains 50.0 grams of carbon 14, and is 300,000 years old. It has a half life of 5730 years. What was its original mass?
A 1.4 kg block is attached to a horizontal spring with spring constant 2800N/m. The block is at rest on a frictionless surface. A 8.90g bullet is fired into the block, in the face opposite the spring, and sticks. What was the bullet's speed if the
A see saw is made of a uniform board 2.6 m long. A girl weighing 440 N sits on the left end, and a boy weighing 640 N sits on the right end. The see saw is balanced when the board is pivoted 1.1 m from the right end. How much does the board weigh?
A dry cell does 7.5. J of work through chemical energy transfer 5.00 C between terminals of the cell. What is the electric potential between the two terminals?
A potter's wheel having a radius 0.47 m and a moment of inertia 10.9 kg·m2 is rotating freely at 46 rev/min. The potter can stop the wheel in 7.0 s by pressing a wet rag against the rim and exerting a radially inward force of 68 N. Find the
Find the potential difference V1 - V2. Point 1 is at the center of the plastic sphere, and point 2 is just outside the sphere.
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