An object's angular momentum changes by 10 kg-m2/s in 2.0 s. What ...

[iveyjurea]

An object's angular momentum changes by 10 kg-m2/s in 2.0 s. What magnitude average torque acted on this object?
 
  A) 2.5 N-m
  B) 40 N-m
  C) 10 N-m
  D) 5 N-m
  E) 20 N-m

Question 2

How much energy would be required to accelerate a 77. kg professor from rest to 90 the speed of light?
 
  A) 2.3 mc2
  B) 0.30 m c2
  C) 1.3 m c2
  D) 0.41 m c2
  E) 0.50 m c2

[spencer.martell]

Answer to Question 1

D

Answer to Question 2

C

[iveyjurea]

Excellent

[smrtceo]

Gracias!