A 1000-kg car is moving at 30 m/s around a horizontal unbanked ...

[student77]

A 1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. What is the magnitude of the friction force required to keep the car from sliding?
 
  A) 9000 N
  B) 9800 N
  C) 300 N
  D) 900 N
  E) 3000 N

Question 2

During a nuclear reaction, 1.7  10-4 J of energy is released. What is the resulting change in mass of the particles involved? (c = 3.00  108 m/s)
 
  A) 5.1  10-4 kg
  B) 4.3  10-11 kg
  C) 1.5  10-13 kg
  D) 4.8  10-18 kg
  E) 1.9  10-21 kg

[rekilledagain]

Answer to Question 1

A

Answer to Question 2

E