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A 38.0-kg child swings in a swing supported by two chains, each 3.08 m long. The tension in each chain at the lowest point is 424 N. Find the child's speed at the lowest point.
A system consists of a uniform electric field of 42.6 N/C, directed in the positive x direction. What is the change in the potential energy of the system?
Only two forces act on a 3.1 kg object that moves with an acceleration of 3.3 m/s2 in the positive direction of a y axis. If one of the forces acts in the positive direction of an x axis and has a
Calculate the energy associated with the magnetic field of a 194-turn solenoid in which a current of 2.00 A produces a magnetic flux of 3.74 10-4 T · m2 in each turn.
Assuming the can to be a cylinder with a height of 12 cm and a diameter of 6.6 cm , find the net inward force exerted on the vertical sides of the can due to atmospheric pressure.
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V maximum potential difference operating
A 9300 kg boxcar traveling at 21 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 13 m/s. What is the mass of the second car?
David is driving a steady 28.0 {rm m/s} when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 {rm m/s^2} at the instant when David passes.
If the average force exerted on the straw by the tree was 70 N, what was the speed of the straw when it hit the tree?
Find the temperature (in Celsius) at a depth of 35.0 km (near the base of the crust). Ignore the heat generated by the presence of radioactive elements.
An ocean liner leaves New York City and travels 17.0° north of east for 232 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship
For a damped oscillator with a mass of 170 g, a spring constant 140 N/m and a damping coefficient of 69 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude a
A girl is standing at the edge of a cliff 201 m above the ground. She reaches out over the edge of the cliff and throws a rock straight upward with a speed of 6.17 m/s. a)How long does it take the
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. What fration of the initial kinetic energy of the putty is lost in this collision?
A plane is flying horizontally with speed 270 m/s at a height 1330 m above the ground, when a package is dropped from the plane. The acceleration of gravity is 9.8 m/s2 .A second package is thrown
The weight of passengers on a roller coaster increases by 56 as the car goes through a dip with a 39 radius of curvature. What is the car's speed at the bottom of the dip?
IP A 2.9 block slides with a speed of 1.5 on a frictionless horizontal surface until it encounters a spring. If the block compresses the spring 4.8 before coming to rest, what is the force constant
A museum curator moves artifacts into place onmany different display surfaces. What is Fs, max for moving a 164 kg aluminum sculpture across a horizontal steel platform?
An artillery shell is fired with an initial velocity of 350 m/s at 74° above the horizontal. To clear an avalanche, it explodes on a mountainside 33.0 s after firing. What are the x and y compo
The perpendicular bisector, equidistant to both stars. (a) Find an expression for the restoring force on the asteroid that drives it into a vertical oscillation.
An ocean liner leaves New York City and travels 59.0° north of east for 190 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship
The temperature of equal masses of three different liquids A, B and C are 12oC, 19oC and 28oC respectively. The temperature when A and B are mixed is 16oC and when B and C are mixed is 23oC. What w
How many balloons can be blown up if each filled balloon os a sphere 30.0 cm in diameter at 27.0 and absolute pressure of 1.20atm?
A dog sits 1.53 m from the center of a merry- go-round with an angular speed of 1.65 rad/s. If the magnitude of the force that maintains the dog's circular motion is 38.0 N, what is the dog's mass?
A roller-coaster car moves 210 ft horizontally and then rises 144 ft at an angle of 30° above the horizontal. It then travels 144 ft at an angle of 40° downward. What is its displacement fr