![]() According to many reports, it was originally supposed to have a screen made from sapphire, but that was changed at the last minute for a hardened glass screen. An internet search gives a best estimate of the mass of the Enterprise (in the 2009 movie) as 2 × 10 9 kg 2 × 10 9 kg.īecause this problem involves only one direction (i.e., the direction of the force applied by the engines), we only need the scalar form of the impulse-momentum theorem Equation 9.7, which isĪpple released its iPhone 6 Plus in November 2014. To use that, though, we need the mass of the Enterprise. This suggests using the impulse-momentum relation. In particular, we know the amount of time that the force acted. We are asked for a force we know the initial and final speeds (and hence the change in speed), and we know the time interval over which this all happened. Assuming this maneuver is completed in 60 s, what average force did the impulse engines apply to the ship? When Captain Picard commands, “Take us out,” the starship Enterprise ( Figure 9.11) starts from rest to a final speed of v f = 7.5 × 10 7 m/s v f = 7.5 × 10 7 m/s. ![]() The general approach is the same.įigure 9.11 The fictional starship Enterprise from the Star Trek adventures operated on so-called “impulse engines” that combined matter with antimatter to produce energy. The most common questions asked in relation to impulse are to calculate the applied force, or the change of velocity that occurs as a result of applying an impulse. Thus, you must subtract the initial momentum from the final momentum, and-since momentum is also a vector quantity-you must take careful account of the signs of the momentum vectors.
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