Question

13. If the blocks shown in the figure are released
from rest, what is the power delivered by the
tension in the string to the 2 kg block in 2 s?
2kg
TIITTI
3kg
(1) 72 watt
(3) 36 watt
(2) 144 watt
(4) 180 watt​

Answer 1

Answer:

The correct answer of this ques is opt(1), i.e. 72 watt.

Answer 2

The correct answer is 72 watt.

Given: Mass of block = 2 kg.

Time = 2 sec.

To Find: Power delivered by the tension.

Solution:

$power=\frac{work done}{time}$

work = Force × displacement

Force = mass * acceleration

= 2 * 10

Force = 20 N

x = $ut+\frac{1}{2} at^{2}$

x = 0 + $\frac{1}{2}*6*2^{2}$

x = 12 m.

$Power=\frac{12*12}{2}$

Power = 72 watt.

Hence, the power delivered by the tension is 72 watt.

#SPJ1