Question

You drive a race car around a circular track of radius 300 m at a constant spe 108 km/h. Your acceleration will be: A) 39.9 m/s B) 9.8 m/s C) 3.0 m/s D) 0.36 m/s

Answer 1

C

Step-by-step explanation:

Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.

Answer 2

C

Step-by-step explanation:

Centripetal acceleration is:

a = v² / r

First, convert km/h to m/s:

108 km/h × (1000 m / km) × (1 h / 3600 s) = 30 m/s

Therefore, the acceleration is:

a = (30 m/s)² / 300 m

a = 3 m/s²