/ʌ/ is a short, relaxed vowel sound.
Open your mouth wide.
Your tongue should rest in the middle of your mouth.
It's pronounced /ʌ/.../ʌ/

The dust is under the rug.
/ðə dʌst ɪz 'ʌndər ðə rʌg/
He’s much too young.
/hiz mʌtʃ tuː jʌŋ/
You’re in love with my cousin.
/jɔːr ɪn lʌv wɪð maɪ ˈkʌzn/
I’d love to come on Sunday if it’s sunny.
/aɪd lʌv tə kʌm ɒnˈsʌndeɪ ɪf ɪts 'sʌni/
The mother won some of the money, but not enough.
/ðə mʌðər wʌn sʌm ʌv ðə 'mʌni bʌt nɒt ɪˈnʌf/