Ariver flows south with a speed of 2 m/s. a motorboat crosses the river due east with a velocity of 4.2 m/s relative to the water. the river is 500 m wide. a) what is the magnitude and direction of the boats velocity relative to the earth? b) how much time is required for the boat to cross the river? c) how far south of the boats starting position will the boat reach the opposite bank of the river? d) what direction should the boat head to reach a point on the opposite bank directly east from the boats starting position? assume the boats speed is still 4.2 m/s. e) what would be the boats velocity relative to the earth using the heading in part (d)? f) how much time is required to cross the river using the heading in part (d)?
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Physics, 21.06.2019 17:30
Abaseball picther can throw a ball at about 90 miles per hour, v = 40 m/s, on solid rock ground. we now put him into space. when he throws the ball, which weighs mb = 0.15 kg moves away from himat the same speed. how long does it take the ball thrown in space to travel the 30 meters to the batter? he weighs mp = 100kg
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Physics, 21.06.2019 23:10
A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m
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Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?
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Ariver flows south with a speed of 2 m/s. a motorboat crosses the river due east with a velocity of...
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