Ask a New Question
Search
Questions and answers by
Oisin
Questions (10)
(b)A centrifuge has a maximum rotation rate of 10,000 rpm and can be stopped in 4 seconds. Assume the deceleration is uniform.
1 answer
1,624 views
The flywheel is initially at rest. A force of 250 N is applied tangentially to the rim, causing it to rotate about its central
1 answer
559 views
(b)A centrifuge has a maximum rotation rate of 10,000 rpm and can be stopped in 4 seconds. Assume the deceleration is uniform.
0 answers
657 views
(ii) For the wheel of diameter 10 cm, find its final speed after traversing a distance of 10 m down an incline of 25º. Assume
1 answer
543 views
(i)For the wheel of diameter 10 cm, find its final speed after traversing a distance of 10 m down an incline of 25º. Assume it
2 answers
857 views
Show that the escape speed n for a body located on the surface of a planet of radius r and mass M is given by the expression v =
0 answers
486 views
A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver
1 answer
524 views
A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver
1 answer
611 views
(b) Given that Icm = ½MR2 for a uniform solid wheel,
(i) show that the rotational kinetic energy is half the translational
2 answers
662 views
A constant force of 20N is applied tangentially to a string wound on the rim of a 40 cm diameter wheel, initially at rest.
(i)
6 answers
1,499 views
Answers (6)
Wow thanks very much I was usig the wrong formula for loss of PE that's where i went wrong its always helpful to have people to tell you where youve gone wrong
How is the change in entory calculated?
ii) Apply conservation of energy, making sure you count both translational and rotational KE now with this part Im not sure what you mean? i understand the conservation of energy but that wont give me the speed of the wheel
how did u find the angular velocity? im tryin to use v = wr but i don't know where to find the normal velocity of the rim
no i mean to convert 45degrees into rads you multiply by 2pi thanks for your help
so for the first part 20N * 0.2m * 2pi is that correct? also how did you get your torque? (iii) What is the angular momentum of the wheel after this time?
