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A one pound weight is released 3 feet off the ground. At the same time a two pound weight is released 5 feet off the ground. When will the two weights have the same altitude? Assume no air friction.
A 280-kg piano slides 4.3 m down a 30o incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
A heavy crate is attached to the wall by a light rope. Another rope hangs off the opposite edge of the box. If you slowly increase the force on the free rope by pulling on it in a horizontal direction, which rope will break? Ignore friction and th..
A 70-kg climber is hanging by a rope off the edge of a cliff, with the top end of the rope tied to a 200-kg rock. However, the rock is sitting on an icy horizontal surface,
An electron with initial velocity v0 = 1.20 × 10^5 m/s enters a region 1cm long where it is electrically accelerated. It emerges with velocity v = 5.87 × 10^5 m/s. What is its acceleration, assumed constant? (Such a process occurs in conventional ..
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 56.1° and 48.5°, respectively
A 7.80-g bullet moving at 560 m/s penetrates a tree trunk to a depth of 5.2 cm. Use work and energy considerations to find the average frictional force that stops the bullet
question1a woman walks 290 m in the direction 37deg east of north then 177 m directly east. finda magnitude andb angle
Let us model the electrical behavior of such a molecule by a pair of +/- 1.60x10^-19 -C charges connected by a spring with force constant= 2.05x10^-4 N/m. What is the magnitude of the induced electric dipole moment
The mass of a robot is 3780 kg. This robot weighs 3540 N more on planet A than it does on planet B. What is the difference MA - MB in the masses of these planets
A boy of mass 35 kg and a girl of mass 40 kg are skating towards each other with speeds of 2.5 m/s, and 2.0 m/s respectively. Assume that there is no friction, and find their combined velocity after they meet
A flat sheet of ice (n = 1.309) has a thickness of 1.6cm. It is on top of a flat sheet of crystalline quartz (n = 1.544) that has a thickness of 0.86cm. Light strikes the ice perpendicularly and travels through it and then through the quartz. In t..
How far does Tinki drive before passing David.
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