Physics, 09.11.2019 00:31, skpdancer1605
Aboat with a mass of 1000 kg drifts with the current down a straight section of river parallel to the +x+x axis with a speed of 2.0 m/s. at t=0t=0 the boat engages its engines, and accelerates at 2.7 \,\mathrm{m/s^2}2.7m/s2. if the boat is oriented with its nose 45^\circ45∘ from the +x+x axis, which of the following is a possible value for the boat's momentum at t = 3.0\, \mathrm{s}t=3.0s after the engine had started?
pick the correct answer
a. \vec{p} = (7700 \hat{i} + 5700 \hat{j}) \; \mathrm{kg \, m/s}p=(7700i^+5700j^)kgm/s
b. \vec{p} = (9500 \hat{i} - 1400 \hat{j}) \; \mathrm{kg \, m/s}p=(9500i^−1400j^)kgm/s
c. \vec{p} = (5700 \hat{i} + 9500 \hat{j}) \; \mathrm{kg \, m/s}p=(5700i^+9500j^)kgm/s
d. \vec{p} = ( 1400 \hat{i} - 7700 \hat{j}) \; \mathrm{kg \, m/s}p=(1400i^−7700j^)kgm/s
e. none of these are correct
Answers: 2
Physics, 22.06.2019 09:00, alisonnn101
A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?
Answers: 1
Physics, 22.06.2019 13:50, demitae8839
9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.
Answers: 1
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