Top answers

How do I calculate the reactant forces for the supports of the beam where the centre of mass is not same distance from each support?

This can be done by taking moments. To reduce the number of equations a moment should be taken so that one of the forces goes through the centre of place from which moments are being taken. We will choose to...
BW
Answered by Benjamin W. • Maths tutor
6944 Views

Ignoring air resistance, use an energy argument to find the speed of a ball when it hits the ground if it is dropped from 50m, where m is the mass of the ball.

Original energy: GPE=50 9.81 m KE=0 Final energy: GPE=0 KE=(1/2)mv 2 Therefore (1/2)mv 2 = 50 m 9.81 . The m cancels and simplifying the equation we are left with v 2 = 50 2 9.81, therefore v = 31 ms -1
ZT
Answered by Zach T. • Physics tutor
2824 Views

Complete the series and explain your answer: 2,4,8,...,...

2,4,8,16,32 The series is multiplying by two every time.
ZT
Answered by Zach T. • Maths tutor
2697 Views

Explain the role of the diaphragm in breathing out

The external intercostal muscles contract which moves the diapraghm upwards. This reduces the volume of the thorax and therefore with less space, the pressure in the lungs goes up. The pressure in the lungs ...
KA
Answered by Kai A. • Biology tutor
13376 Views

Use BIDMAS to find what 2+5+7x3 equals

Going through the checklist: B= Brackets (there are no brackets) I=Indices (there are no powers) D= Division (there is no division) M= Multiplication. we have a times sign in this problem between the 3 and t...
ZT
Answered by Zach T. • Maths tutor
4067 Views