Engineering, 14.05.2021 02:30, Ryvers

I need help on this In which situation is the speed of the car constant while its velocity is changing?

The car travels down a straight track at 30 m/sec

The car travels around a circular track at 30 m/s

The car begins from rest and accelerates to 20 m/s

The car begins traveling at 30 m/s and decreases to 15 m/s

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I need help on this In which situation is the speed of the car constant while its velocity is chang...