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 23 times)

@Brianna17 · **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.