Physics, 27.03.2020 01:50 jacksonhoyt8049
A small boat is crossing a lake on a windy day. During some interval of time, the boat undergoes the given displacement Δ → r . Δ → r = ( 3.29 m ) ^ ı + ( 2.67 m ) ^ ȷ During the same interval of time, the wind exerts the given constant force → F on the boat. → F = ( 281 N ) ^ ı − ( 135 N ) ^ ȷ What is the total work done on the boat by the wind over this period of time?
Answers: 2
Physics, 22.06.2019 19:30, alexmarche8637
Contains chemical energy. a. heat b. light c. natural gas
Answers: 2
Physics, 22.06.2019 21:20, rosieposie27
Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s
Answers: 3
Physics, 22.06.2019 23:30, alangonsales6232
You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?
Answers: 3
A small boat is crossing a lake on a windy day. During some interval of time, the boat undergoes the...
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