A 50.0-kg box is being pushed along a horizontal surface by a ...

[altibaby]

A 50.0-kg box is being pushed along a horizontal surface by a force of 250 N directed 28.0 below the horizontal. The coefficient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box?
 
  A) 0.769 m/s2
  B) 1.77 m/s2
  C) 3.16 m/s2
  D) 6.31 m/s2
  E) 8.53 m/s2

Question 2

A nucleon is either a
 
  A) positron or an electron.
  B) proton or an electron.
  C) neutron or an electron.
  D) proton or a neutron.

[emsimon14]

Answer to Question 1

A

Answer to Question 2

Answer: D

[altibaby]

Excellent

[Joy Chen]

Gracias!