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Paula has gone 1 km east as the total displacement. The total distance would be 7 km. Why? Well, the difference between displacement and distance is displacement is directional which is why it’s included in velocity and not speed. However, distance is more broad and not as specific.
Answer: 12.6 s
We would use the equation of motion:
where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken.
It is given that the lead car has an initial velocity, . It decelerates with to stop (v=0). we need to calculate the time taken by the lead car to stop.
Answer:
A
Explanation:
because it is accelerating and as the vehicle accelerates the speed increas
A. Direction
Speed is just distance divided by time, but velocity is displacement divided by time and displacement has direction. Speed will always be positive, but velocity can be either positive or negative.