Edpuzzle My Classes
MULTIPLE CHOICE QUESTION
5. An 1800 kg luxury car at rest is struck from
behind by a compact car with a mass of 900 kg
moving at +20.0 m/s. The two cars become
entangled in the collision. A) What is the velocity of
the entangled mass after the collision?
Solve
20 m/s
Before:
58.2 m/s
v. = 20 m/s
6.67 m/s
0.0 m/s
After:
VE = ?
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09:00

In the future, people will only enjoy one sport: electrodisc. in this sport, you gain points when you cause metallic discs hovering on a field to exchange charge. you are an electrodisc player playing the popular four disc variant. the disks have charges of qa = −8.0 µc, qb = −2.0 µc, qc = +5.0 µc, and qd = +12.0 µc. (1) you bring two disks together and then separate them. you measure the resulting charge of these two disks and find that it is +5.0 µc per disk. which two disks did you bring together? (a) a and b (b) a and c (c)a and d (d)b and c(e) b and d (f) c and d. (2) you bring three disks together and then separate them. you measure the resulting charge of these three disks and find that it is +3.0 µc per disk. which three disks did you bring together? a, b, and c (a) a, b, and d (c) a, c, and d (d) b, c, and d. (3) given the resulting charge of each disk measured in (b) is +3.0 µc, how many electrons would you need to add to a disk of this charge to electrically neutralize it? electrons