Question

in which situation are both the speed and velocity of the car changing? a the car turns left at 5 m/s. b the car travels down a straight track at 30 m/s. c the car travels around a circular track at 30 m/s. d a car traveling at 30 m/s slows to 15 m/s and turns the corner

Explanation:

Step1: Recall speed and velocity concepts

Speed is scalar, velocity is vector with magnitude and direction.

Step2: Analyze option A

Turning left changes direction, speed is constant at 5 m/s.

Step3: Analyze option B

Straight - track at 30 m/s, speed and direction are constant.

Step4: Analyze option C

Circular track at 30 m/s, speed is constant, direction changes.

Step5: Analyze option D

Slows from 30 m/s to 15 m/s (speed changes) and turns corner (direction changes).

Answer:

D. A car traveling at 30 m/s slows to 15 m/s and turns the corner