Speed is a scalar quantity while velocity is a vector quantity.
Velocity refers to distance covered within a given time interval in a specified direction while speed refers to the distance covered within a given time interval. Speed is a scalar quantity while velocity is a vector quantity. Therefore, in calculations that has to do with velocity, the direction must be taken into consideration.
1) The answer that represents speed in question 1 is 35 m/s because it does not involve direction.
2) The average speed is given by;
Speed = distance/time
Distance = speed × time
Distance = 60 mph × 2 hours
Distance = 120 miles
3) If a car goes from point A to point B then back again, the velocity is zero but the speed is positive because the car moves back and forth having a zero resultant velocity. The total speed is simply the algebraic sum of the speed of moving from A ----> B and B -----> A
4) If a car goes from point A to point B and then returns to point A, the velocity of the car is 0 mph.
5) The average speed is given by;
Speed = distance/time
time = distance/speed
time = 30 miles/15 mph
time = 2 hours
Learn more: https://brainly.com/question/13164491
