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1) An object of mass 2.5 kg experiences a force of 12 N towards the east and 5 N towards the north. The magnitude of the acceleration is _____ m/s2.
2) A wooden block slides directly down an inclined plane, at a constant velocity of 12.0 m/s. What is the coefficient of friction, if the plane makes an angle of 35 degrees with the horizontal?
3) A boy pulls with a force of 20 N on the 300 N wagon. What acceleration does the wagon have?
4) If the distance between two stars increases by a factor of 10, then the gravitational force between them changes by a factor of...
One side of the roof of a building slopes up at 37.0°. A roofer kicks a round, flat rock that has been thrown onto the roof by a neighborhood child.
A tuning fork of unknown frequency is noted to be higher than one marked 512 hz and lower than one marked 1000 hz. You discover resonance points at .11 m and .53 m. Using 347 m/s for speed of sound what is the frequency of the new fork.
There are two horizontal forces on the 2.0 kg box in the overhead view of the figure below but only one is shown. find the second force.
the overhead cable for a street trolley is strung horizontally 5 m above the ground. What is the magnetic field at street level directly under the cable
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
Two blocks are connected by a very light string passing over a massless and frictionless pulley, Find the total work done on 20.0-N block if ?s=0.500 and ?k=0.325 between the table and the 20.0-N block
A house is 30.0 ft long and 25.0 ft wide, and has 8.0 ft high ceilings. What is the volume of the interior of the house
Spaceships of the future may be powered by ion-propulsion engines in which ions are ejected from the back of the ship to drive it forward. What is the velocity of the ions relative to the earth
A baseball is popped straight up into the air and has a hang-time of 6.25 s. Determine the height to which the ball rises before it reaches its peak
In a certain region, the earth's magnetic field has a magnitude of 4.7 × 10-5 T and is directed north at an angle of 69° below the horizontal, Determine the bullet's electric charge
When a guitar string is sounded along with a 440 Hz tuning fork, a beat frequency of 4 Hz is heard. compute the frequency of the string
Three particles, each with a mass of 0.25 kg, are located at (- 4.0 m, 0), (2.0 m, 0), and (0, 3.0 m) and are acted on by forces, and respectively.
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