Athin, uniform, rectangular sign hangs vertically above the door of a shop. the sign is hinged to a stationary horizontal rod along its top edge. the mass of the sign is 2.40 kg and its vertical dimension is 55.0 cm. the sign is swinging without friction, becoming a tempting target for children armed with snowballs. the maximum angular displacement of the sign is 25.0â° on both sides of the vertical. at a moment when the sign is vertical and moving to the left, a snowball of mass 450 g, traveling horizontally with a velocity of 160 cm/s to the right, strikes perpendicularly the lower edge of the sign and sticks there. (a) calculate the angular speed of the sign immediately before the impact. (b) calculate its angular speed immediately after the impact. (c) the spattered sign will swing up through what maximum angle?
Answers: 1
Physics, 22.06.2019 10:30
Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.
Answers: 3
Physics, 22.06.2019 11:00
I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.
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Physics, 22.06.2019 11:30
Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?
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Physics, 22.06.2019 15:00
Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost
Answers: 1
Athin, uniform, rectangular sign hangs vertically above the door of a shop. the sign is hinged to a...
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