If an electron is accelerated from rest through a potential ...

[Garrulous]

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

[Ptupou85]

Answer to Question 1

C

Answer to Question 2

D

[Garrulous]

Excellent

[xiaomengxian]

Gracias!