گاما رو نصب کن!

{{ number }}
اعلان ها
اعلان جدیدی وجود ندارد!
کاربر جدید

جستجو

پربازدیدها: #{{ tag.title }}

جستجوهای پرتکرار

میتونی لایو بذاری!

A cyclist, working at a constant rate of $400{\text{ }}W$, travels along a straight road which is inclined at ${2^ \circ }$ to the horizontal. The total mass of the cyclist and his cycle is 80 kg. Ignoring any resistance to motion, $80{\text{ }}kg$. Ignoring any resistance to motion, find, correct to 1 decimal place, the acceleration of the cyclist when he is travelling

a) uphill at $4{\text{ }}m{\text{ }}{s^{ - 1}}$,

b) downhill at $4{\text{ }}m{\text{ }}{s^{ - 1}}$.

پاسخ تشریحی :
نمایش پاسخ

Driving force $ = 400/4$

$DF - 80g\,\,\sin {2^ \circ } = 80a$ (a) or

$DF + 80g\,\,\sin {2^ \circ } = 80a$ (b)

Acceleration is $0.9m{s^{ - 2}}$ (a) or

Acceleration is $1.6m{s^{ - 2}}$ (b)

Acceleration is $1.6m{s^{ - 2}}$ (b) and

Acceleration is $0.9m{s^{ - 2}}$ (a)

SR(max. 3/5) for candidates who have sin and cos interchanged

Driving force = 400/4

$a =  - 8.74$ (a) and $a = 11.2$ (b)

تحلیل ویدئویی تست

تحلیل ویدئویی برای این تست ثبت نشده است!