A race car traveling at a constant speed of 50 m/s drives around ...

[dollx]

A race car traveling at a constant speed of 50 m/s drives around a circular track that is 500 m in diameter. What is the magnitude of the acceleration of the car?
 
  A) 0 m/s2
  B) 1.0 m/s2
  C) 10 m/s2
  D) 0.63 m/s2
  E) 2.2 m/s2

Question 2

A 5.0- resistor and a 9.0- resistor are connected in parallel. A 4.0- resistor is then connected in series with this parallel combination. An ideal 6.0-V battery is then connected across the series-parallel combination of the three resistors.
 
  What is the current through (a) the 4.0- resistor? (b) the 5.0- resistor? (c) the 9.0- resistor?

[Sarahjh]

Answer to Question 1

C

Answer to Question 2

(a) 0.83 A (b) 0.53 A (c) 0.30 A

[dollx]

Gracias!

[debra928]

Great answer, keep it coming