Question

(c) The driver of a car traveling at a speed of 17 m/s slams on the brakes and comes to a stop in 3 s. If we assume that the speed changed at a constant rate (constant net force), what was the average speed during this 3 s interval?

Answer 1

`v_(avg)=8.5\ m/s`

Step-by-step explanation:

given,

initial speed of the car, v₁ = 17 m/s

final speed of the car, v₂ = 0 m/s

car stops in time = 3 s

we need to calculate average speed

`v_(avg)=(v_1 + v_2)/(2)`

`v_(avg)=(17 + 0)/(2)`

`v_(avg)=(17)/(2)`

`v_(avg)=8.5\ m/s`

average speed of the car during interval of 3 s is 8.5 m/s