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Q. A very small charged block with a mass of 2.05 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal. The block does not slide down the plane because of a 490 N/C uniform electric field that points parallel to the surface downward along the plane. What is the charge on the block?
Q. A car traveling 99km/h is 140m behind a truck traveling 72km/h. How long will it take the car to reach the truck?
An archer pulls her bow string back 0.40m by exerting a force that increases uniformly from zero to 25 N. How much work does the archer do in pulling back the bow.
Pete slides a crate up a ramp with constant speed at an angle of 27 degrees by exerting a 133 N force parallel to the ramp. How much work has been completed against gravity when the crate is raised a vertical distance of 1.6 m? The coefficient of fri..
A puddle holds 150 grams of water. If .50 grams of water evaporates from the surface, what is the approx temperature altering of the remaining water.
Two forces are acting on an object: 8 N [N22.1 ºE], and 5 N [S 34.8 ºE]. What is the magnitude (in N) of the resultant force acting on the object.
An iguana that is slowing down at a uniform rate of acceleration while moving in positive direction.
A ball rolling along at speed v without slipping on a horizontal surface while it comes to a hill that rises at a constant angle above the horizontal.
Hakeem throws an 8.50 g ball straight down from a height of 2.0 m. The ball strikes the floor at the speed of 7.5 m/s. What was the initial speed of the ball? Suppose that air resistance is negligible.
A 75-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 cm in diameter. Find out the pressure exerted on the floor by each leg of the chair; assume the weight is evenly distributed.
How to find out potential energy
What is the potential difference measured by voltmeter
Throughout liftoff, a hot-air balloon accelerates upward at a rate of 3m/s^2. The balloonist drops an object over the side of the gondola when the speed is 13m/s.
If the ball's speed just before impact is 100 m/s, what is the angular speed of the rod immediately after the collision.
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