science
Grade-7
Easy
Question
Which of the following does the following graph indicate?
a. The velocity of A is greater than that of B.
b. The velocity of B is greater than that of A.
c. Both A and B are undergoing a uniform motion.
d. Both A and B are undergoing a non-uniform motion.
e. Unlike A, B starts from rest.
f. The final velocity of A is greater than that of B.
g. B has covered a greater distance than that of A.
- Only b, c, and e are correct
- All are correct except d
- Only a, c, and f are correct
- All are correct except g
Hint:
For studying Distance-time graph, Speed = Distance/time can be very helpful.
The correct answer is: Only a, c, and f are correct
- Only a, c and f are correct. Let's understand each option in elaborate way.
- a. At any instance of time, Particle A is covering more distance than Particle B. Hence it can be said that Velocity of A is greater than B.
- c. By using formula, Speed = Distance/Time. A and B are covering equal distance with same interval respectively. Hence, it can be said that both are undergoing a uniform motion.
- f. By using formula, Speed = Distance/time. Final velocity of A will be 20 m/sec and Final velocity of B will be 10 m/sec Therefore, final velocity of A will be greater than of B.
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