A 10kg cube of iron with length 5cm is resting on a table surface. Assuming the acceleration under gravity of the block is 9.81ms^(-2), what is the pressure on the table?
Pressure is given by P=F/A, where F is force and A is area. Neither are given in the question, but A is the area of the cube in contact with the table; this is the area of one face of the cube, so A=LL=0.050.05=0.0025 m2 (Side Note - Remember to convert to meters!).
Now we have A, we need F - this is given by F=ma, which is F=10*9.81=98.1 N.
Finally, P=F/A=98.1 N/0.0025 m2= 39240 Pa. (Side Note - 1 Pa=1 N/1 m2)
WH
Related Physics GCSE answers
All answers ▸What is an example of a natural satellite?
X-rays and gamma rays have different uses. Describe one use for X-rays and one use for gamma rays.
Why is it that spectral lines emitted from stars in distant galaxies appear to be shifted towards the red end of the electromagnetic spectrum?
If a car sets off from rest with a constant acceleration of 3 m/(s^2), what would its speed be after 5 seconds?