Author Question: If an electron is accelerated from rest through a potential difference of 300 V, find its ... (Read 28 times)

Garrulous · **on:** Jul 28, 2018

If an electron is accelerated from rest through a potential difference of 300 V, find its approximate speed at the end of this process. (e = 1.6 10-19 C; me = 9.1 10-31 kg)
a. 2.5 107 m/s
c. 1.0 107 m/s
b. 2.1 107 m/s
d. 1.4 107 m/s

Question 2

A 90-kg halfback running north with a speed of 10 m/s is tackled by a 120-kg opponent running south at 5.0 m/s. The collision is perfectly inelastic. Compute the velocity of the two players just after the tackle.
a. 1.4 m/s south
c. 2.8 m/s north
b. 2.8 m/s south
d. 1.4 m/s north