With 140.0 A, the students found t and v for proiec having different masses Pass

Question

With 140.0 A, the students found t and v for proiec having different masses Passage Ill A railgun is a device that uses electrical energy to tiles having different m launch projectiles. tiles having different masses, mp (see Table 2). Some students constructed a railgun from a U-shaped piece of metal and an electrical power supply (see Figure 1). detector (m) (sec) (m/sec) (sec) (m/sec) (sec) (m/sec) 0.100 0.100 2.00 0.141 1.41 0.173 1.15 0.200 0.141 2.83 0.2002.00 0.245 1.63 0.300| 0.173| 3.46 0.245| 2.45 0.300| 2.00 0.400 0.200 4.00 0.283 2.83 0.346 2.31 Each projectile was metallic. Together, the U-shaped metal, the power supply, and the projectile formed an electrical circuit. The railgun lay entirely within a magnetic field with a strength of 0.5 tesla, so that when an electrical cur- rent flowed in the circuit, the magnetic field and the cur rent combined to produce an electromotive force that 13. If an additional trial had been conducted in Study 2 propelled the projectile along the rails. combined to prduce an eleetioc morld a no the caur.13. If an additional trial had been conducted in Study 2 with mp 25 g, how long would it most likely have taken the projectile to reachx0.400 m? In each trial of the following studies, the projectile A. Less than 0.200 sec was launched from Position P (x = 0.000 m) at time to 0.000 sec. Detectors were positioned at x = 0.100 m. 0.200 m, 0.300 m, and 0.400 m along the projectile's path. When the projectile passed a detector, the detector signaled a computer, which determined the time, , of the projec 14. Based on the information given, which of the follow tile's passage and the projectile's speed, v B. Between 0.200 sec and 0.283 sec C. Between 0.283 sec and 0.346 sec D. Greater than 0.346 sec ing statements best explains the choice of the type of material used to construct the rails and the projectile? F. This type of material has a low density G. This type of material has a high density H. This type of material is a good electrical insulator J. This type of material is a good electrical conductor. Using a particular projectile, the students found t and v Using a particular projectile tae npu a (seTabl 1 for various electrical currents, I, in amps (A) (see Table 1). 15. In Study 1, for 1- 120.0 A, how long did it take the projectile to travel from x 0.100 m tox = 0.200 m ? Table 1 40.0 A | 1-80.0 A 11=120.0 A (m) (sec) (m/sec)| (sec) (m/sec) (sec) (m/sec) 16. Based on the results of Study 1 and Study 2·the mass of the projectile used in Study 1 was most likely 0.100 0.100 2.00 0.071 2.83 0.058 3.46 0.200 0.141 2.83 0.100 4.00 0.082 4.90 0.300 0.173 3.46 0.122 4.900.100 6.00 0.400 0.200 4.00 0.141 5.66 0.115 6.93

Explanation / Answer

17 ans

basing on the studies 1 and 2

the current and mass mp is directly propertional to X

so the current and mass mp is high the V value is high at given x

the current i=200 A

mass mp=80 g

18 ans

the electrical resistance is increase or decrease while the projectile was propelled along the rails increased because while the projectile was proplled along the rails the length of the circuit decreased

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