-
A mass of 1 kg is suspended by a thread. It is
(i)lifted up with an acceleration 4.9 m/s²,
(ii)lowered with an acceleration 4.9 m/s².
The ratio of the tensions is
-
- 3 : 1
- 1 : 2
- 1 : 3
- 2 : 1
Correct Option: A
In case (i) we have
T1 - (1 × g) = 1 × 4.9
T1 = 9.8 + 4.9 = 14.7 N
In case (ii), l × g – T2 = 1 × 4.9
T2 = 9.8 – 4.9 = 4.9 N
| ∴ | = | = | |||
| T2 | 4.9 | 1 |
