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Date Posted: 01:10:26 04/15/03 Tue
Author: bennytso
Author Host/IP: cm218-252-34-91.hkcable.com.hk / 218.252.34.91
Subject: Re: Question about Mechanics and Static
In reply to: 仇老師 's message, "Re: Question about definition of work done" on 10:30:44 03/06/00 Mon

關於(Mechanics)和(Static) 的問題

Acceleration due to gravity = 10 ms-2

A body traveling at 150km/h is accelerating at the rate of 5ms-2.

Find the distance covered in 8 seconds.

Find the time required to stop the body when the acceleration is 5ms-2.



A 3kg body is fired vertically upwards from the ground with speed of 200km/h.

Find the maximum height it can rise.

It’s potential and kinetic energy after 1.5 seconds.



How to change 100km/h to 27.78m/s?



(Static)



A 8kg block is suspended by two strings as shown in the diagram. The strings are assumed inextensible.

(a) Calculate the weight of the block.

(b) Find the tensions along the strings.

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