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select the quantity that has changed(velocity or speed) for a car that travels north at 88 km/h and then turns east while continuing to move at 88 km/h. define your answer.
A 1070-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam.
A block is given an initial velocity of 5 m/s up a frictionless 20 ° incline. How far up the incline does the block slide before coming (momentarily) to rest.
A spring stretches 4.1 cm when a 11 g mass is hung from it. If a total mass of 25 g attached to this spring oscillates in simple harmonic motion,how to calculate the period of motion.
In an X-ray tube electrons strike a tungsten target (W or "wolfram") after being accelerated through a potential difference V0. Estimate the minimum value of V0 required to observe the Kalpha peak.
A stone is dropped from the top of a cliff at t=0. The splash it makes when striking the water below is heard 6 seconds after it is dropped (i.e. at t=6 sec). How high is the cliff? (i.e. find 'h') suppose that the speed of sound in air is 340m/s ..
A street lamp weighs 152N. It is supported equally by two wires that form the angle of 120° with each other. What is the tension of each of these wires.
A bullet of mass 0.0022 kg initially moving at 496 m/s embeds itself in a large fixed piece of wood and travels 0.64 m before coming to rest. Imagine that an acceleration of the bullet is constant.
Starting in the spring, fruit begins to grow on the outer end of a branch on a pear tree. Define how the center of gravity of the pear growing branch shifts all through the course of the summer.
What is the coefficient of static friction
The leg and cast weigh 220 N. find out the weight and the angle needed so that no force is exerted on the hip joint by the leg plus the cast.
An electron moves in the positive x-direction a distance of 2.38 m in 2.95 x10-8 s, bounces off a moving proton, and then moves in the opposite direction a distance of 1.63m in 3.53x 10-8 s.
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