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You and your friends launch a model rocket. From analysis of its trajectory afterward, you find out that it rose with a constant acceleration and had a speed 4.9 m/s when it reached a height 79.8 metres.
(a) How many seconds after launch does the rocket make it to this height?
(b) What is the (magnitude of the) rocket's acceleration?
(c) What is the height of the rocket after 1.9 seconds?
A spring (k = 60.5 N/m) hangs vertically with its top end fixed. a mass attached to the bottom of the spring then displace it 0.225 m. establishing a new equilibrium. If the mass is further displaced and then released, what's the period of the result..
The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 370g. What tension is needed to tune this string properly
A spaceship has a length of 300m, measured in its own reference frame. It is traveling in the positive x direction at a speed of 0.8c relative to the earth. how long does this light pulse take to reach the tail
Determine how many seconds after the tennis ball is released the collision takes place. Determine the velocity of the tennis ball at the time of its collision with the rock.
A 52 kg woman and a 70 kg man stand 20.0 m apart on frictionless ice. How far from the man is their center of mass (CM)? If each holds one end of a rope, and the man pulls on the rope so that he moves 2.4 m, then how far from the woman will he be now..
What is the average velocity of a car that moved 60km in 3 hours
A converging lens of focal length 10 cm is placed 35 cm in front of a concave mirror with a radius of curvature of 20 cm. An object is placed 13 cm in front of the lens. Locate and describe the final image, and determine its net magni?cation. (ray..
A 40 kg girl sits on a turn table with a moment of inertia of 1200.The turn table completes 1 revolution in six seconds. Calculate the angular speed of the girl
The K series of the discrete x-ray spectrum of tungsten contains wavelengths of 0.018 5 nm, 0.020 9 nm, Determine the ionization energies of the L, M, and N shells
The maximum wavelength for which an electromagnetic wave can ejectelectrons from a platinum surface is 196 nm. what is the maximum speed of the ejected electrons
Two resistors (connected in series with each other) and a 18 Vbattery are connected in a loop. The voltage drop across the firstresistor is 7 V. What is the voltage drop across the secondresistor?
Force F = (-9.0 N) i + (5.0 N) j acts on a particle with position vector r = (-5.0 m) j + (1.0 m) k. What is the torque on the particle about the origin
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