How much work is required to increase the velocity of a 4 kg car ...

[@Brianna17]

How much work is required to increase the velocity of a 4 kg car from rest to 5 m/sec?
 a. 10 b. 20 c. 50 d. 100 e. 200 Joules

Question 2

A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 20 m/s north, and the total acceleration of the car is 2.5 m/s2 37 south of west. Which of the following is correct?
 a. R = 0.40 km, and the car's speed is decreasing.
  b. R = 0.20 km, and the car's speed is decreasing.
  c. R = 0.20 km, and the car's speed is increasing.
  d. R = 0.16 km, and the car's speed is increasing.
  e. R = 0.16 km, and the car's speed is decreasing.

[Chou]

Answer to Question 1

c

Answer to Question 2

B

[@Brianna17]

Excellent

[daiying98]

Thanks for the timely response, appreciate it