Physics, 06.05.2020 20:57 wildfire771003
A shot putter launches a 7.26 kg shot by pushing it to the right along a straight line of length 1.65 m and at an angle of 30.0° from the horizontal, accelerating the shot to the launch speed from its initial speed of 2.50 m/s (which is due to the athlete's preliminary motion). The shot leaves the hand at a height of 2.11 m and at an angle of 30.0°, and it lands at a horizontal distance of 15.9 m. What is the magnitude of the athlete's average force on the shot during the acceleration phase? (Hint: Treat the motion during the acceleration phase as though it were along a ramp at the given angle.)
Answers: 3
Physics, 22.06.2019 11:30
Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?
Answers: 1
Physics, 22.06.2019 15:30
At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.
Answers: 1
Physics, 22.06.2019 16:30
He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is
Answers: 2
A shot putter launches a 7.26 kg shot by pushing it to the right along a straight line of length 1.6...
Computers and Technology, 28.11.2019 23:31