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Author Question: How much work is required to increase the velocity of a 4 kg car from rest to 5 m/sec? a. 10 b. 20 ... (Read 48 times)

@Brianna17

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on: Jul 28, 2018
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.


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Chou

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Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

B


@Brianna17

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Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

Joy Chen

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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