Choose the correct options for the following questions.
The average acceleration of a body becomes its instantaneous acceleration when:
Difficulty: Hard
A:
$\triangle \overrightarrow V$ approaches to zero
B:
$\frac{\triangle \overrightarrow{V}}{\triangle t}$ approaches to zero
C:
$\triangle t$ approaches to zero
D:
None
A ball is thrown up vertically above from the ground which then comes down. The time-displacement graph is:
Difficulty: Easy
A:
A straight line
B:
Like that of trajectory of projectile
C:
An irregular-shaped curve
D:
None
A ball is thrown up vertically from the ground level. It completes its journey when it strikes the ground back in 4 seconds. It has travelled more distance in:
Difficulty: Easy
A:
1st second
B:
2nd second
C:
3rd second
D:
None
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