1. An object has moved through a distance. can it have zero displacement? support your answer with an example. 2. A physical quantity is measured- 10m/s. is it speed or velocity?
3. A car is moving with a uniform velocity of 10 m/s. the driver of a car decides to overtake the word moving ahead of a car. so the driver of a car accelerates at 1m/s square for 10 seconds. find the velocity of a car at the end of 10sec. also find the distance travelled by a car while accelerating.
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Explanation:
Yes, if object has moved through a distance, it surely can has zero displacement. as displacement is a vector quantity depending on starting and ending position not on the path.
For example, 1 circle of motion has distance 2πR but 0 displacement.
y=20t−t
2
On differentiation we get
v=20−2t
When the body comes to rest momentarily v=0
20=2t
t=10secs
Displacement in 10 secs
y=20×10−10
2
=200−100=100m
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