17 marks]
Question 1
John and Tou take their toys down to a nearby pond to play. John has a to...
Physics, 23.06.2020 10:57 elopezhilario4389
17 marks]
Question 1
John and Tou take their toys down to a nearby pond to play. John has a toy boat made from wood. He
places the wooden boat on the pond and it floats. Tau, being a checky little boy, wants to make John's
wooden boat sink. So he attaches a piece of lead on one end of the string, and ties the other loose end onto
John's boat and gently places the lead into the water. Determine the smallest amount of lead (mass) that
will be enough to sink John's boat, assuming the specific gravity of wood is 0.5 and the density of the
pond water is equal to the density of pure water
Answers: 1
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Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.
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Another word for electromagnetic energy is a. heat b. force c. matter d. radiation
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