logo
or
search
upload

When a fan is switched on, it makes 10 rotations in the first 2 s. How many rotations will it make in the next 2 s, assuming uniform angular acceleration?

Apne doubts clear karein ab Whatsapp par bhi. Try it now.
CLICK HERE

Loading DoubtNut Solution for you

Watch 1000+ concepts & tricky questions explained!

44.3 K+ views | 2.2 K+ people like this

   
Share
Share

Answer Text

Solution :
`theta=omega_(0) t+(1)/(2)alpha t^(2)` <br> `20pi= 0+(1)/(2)alpha (2)^(2)` (`i`) <br> `20pi+theta'= 0+(1)/(2)alpha(2+2)^(2)` (`ii`) <br> Dividing (`ii`) by (`i`), we get <br> `(20pi+theta')/(20pi)=((4)/(2))^(2)= 4` <br> `theta'=60pi` <br> where `theta'` is the angle rotated in the next `2 s`. <br> Number of rotations `= (60pi)/(2pi)=30`

Related Video

4:10

93.2 K+ Views | 4.7 K+ Likes

2:51

99.6 K+ Views | 32.0 K+ Likes

5:38

4.0 K+ Views | 200+ Likes

7:08

158.1 K+ Views | 7.9 K+ Likes

3:29

1.2 K+ Views | 54 Likes

100+ Views | 9 Likes

4:14

195.1 K+ Views | 9.7 K+ Likes

bottom open in app