Q1. Short Type Questions:
a. The school of a boy from his home is 1 km to the east. When he reaches back home, he says that he had traveled 2 km distance but his displacement is zero. Justify your answer.
b. Under what condition, the average speed is equal to the magnitude of the average velocity.
c. Can the average speed of a moving body be zero?
d. Can the average velocity of a moving body be zero? State examples.
e. A car covers a distance of 5 km in 20 mins. Find the velocity of the car in (1) km/min(2)m/s(3)m/min (4)km/hr .
Answers
1
Yes because the displacement is zero if you travel the path twice and you reach the same point while the distance is sum of distance travelled.
2
The magnitude of average velocity and average speed will be the same when the total distance travelled is equal to the displacement. The average velocity of a body in a certain time interval is given as the displacement of the body in that time interval divided by time
3
The average velocity of a moving object can be zero in the case of a circular path as displacement will be zero but average speed cannot be zero for a moving object
4
yes, if the body travels a certain distance and then back to the original point . In such a case displacement becomes zero and hence the velocity
this is the answer of question
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