Paper 1 October/November 2009 PHYSICS (0625/11) IGCSE
Cambridge
IGCSE
Physics (0625)
بهمن
2009
شامل مباحث:
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
45 دقیقه
پیش نمایش صفحه اول فایل
Danial Naderi
ثبت شده در
24 آذر 1401
An escalator (moving stairs) and a lift (elevator) are both used to carry passengers from the same underground railway platform up to street level.
The escalator takes 20 seconds to carry a man to street level. The useful work done is W. The useful power developed is P. The lift takes 30 seconds to carry the same man to street level.
How much useful work is done by the lift, and how much useful power is developed by the lift?
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