Choose the correct options for the following questions.
A balloon is going upwards with a velocity 12 $\rm{m/s}$. It releases a packet when it is at a height of 65 $\rm{m}$ from the ground. How much time the packet will take to reach the ground if $\rm{g=10 \,\, m/s^{2}}$?
Difficulty: Easy
A:
5 seconds
B:
6 seconds
C:
7 seconds
D:
8 seconds
Newton's 3rd law of motion is for bodies that are
Difficulty: Easy
A:
In motion
B:
At rest
C:
Both A and B
D:
None of these
A person has to cover a distance of 6 km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining distance in the remaining time, his speed (in km/hr) must be
Difficulty: Easy
A:
6 km/hr
B:
8 km/hr
C:
12 km/hr
D:
15 km/hr
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