Homework Answers
13) if an object moves in negative direction then it's velocity is negative. If acceleration in same direction as velocity then car speeding up.
Option B correct. THE CAR IS SPEEDING UP.
14) Change in velocity with respect to time is called acceleration.
Option C correct.
15) velocity, acceleration and displacement are independent on path, here only distance depends on the path.
Option A is correct.
16) as I explained in question 13, if direction of velocity and acceleration are opposite to each other the car is slowing down.
Option A is correct.
17) average speed of car = total distance traveled by car/ time taken
Average speed = 30 km/h
18) total displacement = -7 + 4 = -3km
Option b is correct.
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