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Suppose you wanted to push this crate up the ramp. The crate's weight is 100 N, and the maximum frictional force the ramp can exert on it is 20 N.
A charge q1 = 5 nC is placed at x = 0 and another charge q2 = -2 nC is placed at x = 2 .0 cm. Where should a third positive charge be placed on the x axis so that the net force on it is zero?
A ball is launched directly upward from ground level with an initial speed of 18 m/s. (Air resistance is negligible.) (a) How long is the ball in the air? (b) What is the greatest height reached by th
Two point charges of 50 nC are each placed at the two vertices of an equilateral triangle of side 2.0 m. Find the magnitude of the net electric field at the third vertex of the triangle.?
A blue car with mass mc = 484 kg is moving east with a speed of vc = 18 m/s and collides with a purple truck with mass mt = 1297 kg that is moving south with a speed of vt = 10 m/s . The two collid
However, the left shoe oscillating on spring L has twice the amplitude as the right shoe does on spring R. If spring L has constant k = 174 N/m, how much is the spring constant for spring R?
Extension cords are often made from 1.0 mm diameter copper wire. (a) What is the resistance per unit length of this wire? (b) an electric saw that draws 7.0 A of current is operated at the end of an
What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire with diameter 3.49 ?
A car whose wheels are of radius r feet is driven at a speed v. A pebble is thrown from one of the wheels. For very large v, what angle fives the maximum launch height?
A dish of hot food has an emissivity of 0.39 and emits 15 W of thermal radiation. If you wrap it in aluminum foil, which has an emissivity of 0.07, how much power will it radiate?
A bottle rocket can shoot its projectile vertically to a height of 23.0 . (You can ignore air resistance.) At what angle should the bottle rocket be fired to reach its maximum horizontal range? What
A man stands on the roof of a 19.0 -tall building and throws a rock with a velocity of magnitude 24.0 at an angle of 30.0 above the horizontal. You can ignore air resistance. A. Calculate the maximu
You have two capacitors, one with capacitance 19.5 oF and the other of unknown capacitance. You connect the two capacitors in series with a voltage difference of 341-V applied across the capacitors.
A 1800kg car is traveling along a straight road at 20m/s . Two seconds later its speed is 24m/s . What is the magnitude of the net force acting on the car during this time?
At the point where the spring is compressed a distance d (before the maximum compression, as the elevator is still dropping), find an expression for the speed.
There are a total of four pulleys. One pulley is on the 20 degree mark with 90 gm (grams per meter) over it. Another pulley is on the 140 degree mark with a total of 250 gm over it.
A bowling ball (mass = 4.9 kg, radius = 0.11 m) and a billiard ball (mass = 0.37 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational forc
How far below the top of the well is the surface of the water? I found the correct answer here. =18.4 (b) If the travel time for the sound is ignored, what percentage error is introduced when the de
what are: (a) The magnitude. (b) The angle (relative to the positive direction of thex-axis) of the net force on the particale. (c) What is the angle of the particle's direction oftravel?
A coal-fired electric power plant has an overall efficiency of 35% and an output of 1,997 megawatts. How many terajoules (trillions of joules) of waste heat does it reject to the environment each da
describe what you think the behavior of the circuit will be. Give your reasoning. Explain what is going on in each component of the circuit. Sketch a qualitative graph of the bulb's brightness vs. t
A proton is released from rest at the positive plate of a parallel-plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 4.80×10^4 m/s What will be the proto
A proton is released from rest in a uniform electric field of magnitude 421 N/C. (a) Find the electric force on the proton. (b) Find the acceleration of the proton. (c) Find the distance it travels
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.15 cm, and a -2.32 µC charge is located at y = -1.40 cm. (a) Find the total electric potential at the origin. (b)
What is the maximum distance that the box descends below its initial position? At what value of does the box return to its initial position?