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What is a moment?

A moment about a point is the product of a force applied and the distance perpendicular to the line of action of that force. So M = F*d
KT
Answered by Kieran T. • Physics tutor
3178 Views

A ball is initially at rest and is dropped from a height of 10m. Calculate the velocity of the ball when it reaches the ground

For this we need to use a SUVAT equation. S=displacement U=initial velocity V=final velocity A=acceleration T=time In the question we are give U=0m/s since the ball is at rest to start with Since the ball is...
CG
Answered by Catherine G. • Physics tutor
12046 Views

Experimentally, how would you calculate the Young's modulus of a material?

Young's modulus = stress/strain. Stress = F/A Strain= e/l. Measure the length of a wire between 2 points, placing a marker at each. Also measure the diameter to calculate the cross sectional area of the wire...
BL
Answered by Ben L. • Physics tutor
2926 Views

Show that gravitational force within a nuclei is negilible compared with the electric repulsion.

Electric Field Repulsion - 90N Gravitation Field Attraction - 7.3x10^-35N
MS
Answered by Matthew S. • Physics tutor
2935 Views

calculate the resistivity in a 1.2m length of cylindrical wire with radius 1cm. The resistance of the wire is 0.01 kilo Ohms

The primary equation in this calculation is rho = RA/L Where rho is resistivity, A is cross sectional area, L is length, and R is resistance The resistance and length are given in the question. Resistance ho...
CS
Answered by Calum S. • Physics tutor
4248 Views