A 1000-kg car is moving at 30.0 m/s around a horizontal curve ...

[krzymel]

A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force required to keep the car from sliding?
 
  A) 9000 N
  B) 9810 N
  C) 300 N
  D) 900 N
  E) 3000 N

Question 2

The heat required to change a substance from the solid to the liquid state is referred to as the
 
  A) heat of fusion.
  B) heat of vaporization.
  C) heat of melting.
  D) heat of freezing.
  E) heat of condensation.

[fraziera112]

Answer to Question 1

A

Answer to Question 2

A

[krzymel]

Thank you!

[fraziera112]

Always glad to help...