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A wheel starts from rest and rotates about its axis with constant angular acceleration. After 7.4 seconds have elapsed, it has rotated through an angle of 23 radians. What is the angular velocity when t=7.4 seconds?
The force exerted to a robot arm from a motor is given as a function of position F = 1.50 + 20.0 x2 (N), How much work is done by the motor when the position of the arm is moved from x = 0.200 m to x = 0.750 m
A woman is riding a Jet Ski at a speed of 25 m/s and notices a seawall straight ahead. what is the minimum distance from the seawall
A skier is initially stationary, but then accelerates at2.4 m/s2 down a hill that isinclined 23° below the horizontal. How far horizontally and vertically has the skier traveled in6 s?
The Earth is constantly being bombarded by cosmic rays, which consist mostly of protons. what is the total charge incident on the atmosphere
An electromagnetic wave strikes a 1.47-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is 8.35 x 10-4 T. How long does it take for the wave to deliver 1110 J of energy to the wall?
The sensor on the torso of a crash-test dummy records the magnitude and direction of the net force acting on dummy. If the dummy is thrown forward with a force of 130-N while simultaneously being hit from the side with a force of 4500N, what force..
Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. Suppose the speeds of the two canoes after they are pushed apart are 0.40 m/s for canoe 1 and 0.28 m/s for canoe ..
a square plate of copper with 54.0 cm sides has no net charge and is placed in a region of uniform electric field of
a roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. a passenger feels
Suppose in the double-slit arrangement, d = 0.150mm, L =120cm, %u03BB =833nm, What is the path difference %u03B4 for the rays from the two slits arriving at point P
The speed of a bobsled is increasing because it has an acceleration of . At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 500 N.
find the total mechanical energy of a mass-spring system with m 1.30kg and maximum speed 0.750
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