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A 10.5 kg uniform board is wedged into a corner and held by a string at a 50 degree angle. Calculate the tension in the string. Hint: take torques about the corner and assume any lenght for the board.
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Question: A pendulum has a period of 1.77 s on Earth. Part A: What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth? Express your answer to two significant figures and include the appr ...
Three people are fighting over a book. The mass of the book is m=9.18kg. Each person exerts a force on the book, F. The angle between the first person and the second person's force is 125.9 degrees. If the first person i ...
When scared, a nine-banded armadillo will jump straight up in the air. The armadillo launches itself upward from the ground with a speed of v0 = 3.81 m/s. How long will the armadillo remain more than 0.033 m off the grou ...
An ideal gas of molecules (of mass 3.3 x 10 -27kg) is at temperature 400 K and density 0.1 kg/m3. The gas is confined within a cube of side length 2 m. What is magnitude of the average force experienced by one of the wal ...
Question: A proton with an initial speed of 600,000 m/s is brought to rest by an electric field. What was the potential difference that stopped the proton? What was the initial kinetic energy of the proton, in electron v ...
Question: A projectile is fired from ground level at time t=0, atan angleθ with respect to the horizontal. It has an initialspeed v0 . In this problem we are assuming that the ground islevel. Part A Find the time tH it ...
Question: A rock thrown with speed 10.5 and launch angle 30.0(above the horizontal) travels a horizontal distance of = 18.0before hitting the ground. From what height was the rock thrown? Use the value = 9.810 for the fr ...
Question: An old-fashioned single-play vinyl record rotates on a turntable at 38.0rpm . What are (a) the angular velocity in rad/s and (b) the period of the motion? The response must be typed, single spaced, must be in t ...
What is the (average) acceleration of a vehicle which speeds up from 22 m/s to 88 m/s in 21.2 seconds? please provide work to explain
Question: One day when you come into physics lab you find several plastic hemispheres floating like boats in a tank of fresh water. Each lab group is challenged to determine the heaviest rock that can be placed in the bo ...
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