[1pt] Which of the following graphs applies to each situation? Each graph shows

Question

[1pt] Which of the following graphs applies to each situation? Each graph shows the behaviour of two objects; east is in the direction of positive d. (E.g., if graph A applies to situation 1, and C to the rest, enter ACCCCC)

1) A jogger overtaking a walker.
2) A race car speeding up to match the speed of a second race car.
3) A car moving at a steady speed is overtaken by a police car starting from rest.
4) An initially moving truck speeding up eastward and a westward moving truck slowing down.
5) A ball thrown upward and a ball thrown downward at the same time with the same initial speed.
6) A car, initially at rest, accelerating and a car moving initially at constant speed applying the brakes until it stops.

Explanation / Answer

1) A jogger overtaking a walker

Graph B - it perfectly describe the situation walker is ahead walking(intercept at d) and jooger has started jooging from d=0 and at later time overtakes the walker.

2)A race car sppeding up to match the speed of second race car.

Graph- I One is moving with constant velocity and the other is speeding up to match that velocity.

3) A car moving at a steady speed is overtaken by a police car starting from rest.

Graph- I One is moving with constant velocity and other is speeding up to match its velocity.

4)An initially moving truck speeding up eastward and a westward moving truck slowing down.

Graph-H two opposite trajectories one moving eastward and other moving westward

5)A ball thrown upward and a ball thrown downward at the same time with the same initial speed

Graph-G first the upward thrown ball risis and then falls and second one has been thrown downwards

6)A car, initially at rest, accelerating and a car moving initially at constant speed applying the brakes until it stops.

Graph-A ..the lower one first moving with constant speed(horizontal line) and then its speed decreases till it stops and the second one is accelerating

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