Mindblown: a blog about philosophy.
-
We Are Back
This site started in 2012 with the main goal of just helping students with some physics solutions. The site was hacked recently and luckily, most of the content was salvaged (now in archive). But unfortunately, the site had to be scrapped and remade. As you can see now, the site sas a new format similar…
-
Volunteers/Contributors Needed!!
It is harder for me to update the site. I am looking for contributors who would want to post their physics answers on this site to help the community. I am sure I helped out a lot of people keeping things organized as they are. If any individuals would like to help out the site please leave…
-
A 1-kg of wood is pressed against a vertical wall (µs= 0.25) by a force inclined 40º upward with respect to the vertical axis.
A 1-kg of wood is pressed against a vertical wall (µs= 0.25) by a force inclined 40º upward with respect to the vertical axis. Determine the maximum force which can start the motion of the block. F = (0.25)(9.8 cos40)+(9.8 sin30) / cos(4) – 0.25(sin30)= 7. 77 N
-
The coefficient of friction between the sole of a shoe and a tile span roof is 0.36.
The coefficient of friction between the sole of a shoe and a tile span roof is 0.36. What minimum slope of the roof can start slipping? Θ = tan Θ = tan 20° = 0.36
-
A 1340 kg Triumph TR-8 traveling north at 43 km/hr crashes head-on into a 1850 kg Checker cab moving west at 87 km/hr.
A 1340 kg Triumph TR-8 traveling north at 43 km/hr crashes head-on into a 1850 kg Checker cab moving west at 87 km/hr. The two cars become tangled together. What is their speed a moment after the collision? If east is 0 degrees, north is 90 degrees, etc., at what angle are the entangled cars travelling just…
-
A charge of -7 x 10-8 C exerts a force of 0.045 N on a charge of +6.0 x 10-7.
A charge of -7 x 10-8 C exerts a force of 0.045 N on a charge of +6.0 x 10-7. How far apart far are the charges? f=kQq/r2 Rearanged: [sqrt](kQq/r2) =[√](9×109)(7×10-8C)(6×10-7C)/(0.… r=.092m
-
In reaching her destination, a backpacker walks with an average velocity of 1.27 m/s, due west.
In reaching her destination, a backpacker walks with an average velocity of 1.27 m/s, due west. This average velocity results, because she hikes for 5.89 km with an average velocity of 2.18 m/s due west, turns around, and hikes with an average velocity of 0.555 m/s due east. How far east did she walk (in…
-
The froghopper, Philaenus spumarius, holds the world record for insect jumps.
The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 degrees above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground. The initial velocity is 4 m/s. What horizontal distance did the froghopper cover for this world-record leap?…
Got any book recommendations?