Mechanics | Relativity Answers

An ant wants to take a big piece of candy with mass m=5 g back to its colony. Find the minimum force it needs to move the candy piece (in mN).

Details and assumptions
The friction coefficient between the candy and the ground is k=0.5
The gravitational acceleration is g=9.8 m/s2^2

Hi! The above question disappointed me. Because it does not state whether it is static or kinetic friction coeffiecient. I gave 2 answers 24.5 and 24.6 but i get wrong. Please help me. Thanks

i am thinking of building a mechanical dryer using only firewood. my idea is to build a tank on one end which will serve as my boiler and attached to it is a pipe that networks out into 4 40 meters long x 8 ft wide by 3 inches deep tub which will be filled with about 2 and 1/2 inches of water. The outside of the tub will be insulated with thermal insulator on the side and the bottom. The entire tub will be covered with 40 meters long by 8 ft wide 1.2mm stainless sheet. These will be sealed shut with a gasket on the sides. My problem is i am only hoping to use one boiler at one end and I need to achieve a minimum of 55 degrees Celsius surface temp on the cover stainless sheet up to the very far end of the 40 meters. I am hoping that if I can seal the sides and not allow stem to escape, I will be able to achieve this. Is this physically possible? If not, any advice?

http://www.physicsclassroom.com/Class/vectors/u3l3f1.gif

A system is set up as shown from the link. Mass of box = 15 kg, Mass of ball = 8 kg Coefficient of Static friction(box/table) = .35 Coefficient of Kinetic Friction (Box/Table) = .28
1. Write all Fnet equations for the two objects
2. Use your Fnet equations to solve for the acceleration of the box and the ball and the tension in the cord connecting them.

Two trains are moving each other at velocities of 36 km/h and 54 km/h . A passenger in the first train observes that the second train passes his train in a time interval of 6 seconds . what is length of second train ?

use the gas law to explain
why a car with tightly closed windows will
occasionally have a window blow out or crack
when exposed to the sun on a hot day.

hello i want some clarifications. suppose i have an inflated balloon, obviously it is filled with air particles. and i have learn that particles colliding with walls of a container constitutes a pressure. now suppose i warm the balloon. the air particles will gain more kinetic energy and will more frequently with walls of the container thereby constituting greater pressure and ALSO the balloon's volume will increase. BUT this does not apply to Boyle's law which states that pressure is indirectly proportional to volume. please brighten my mind. thanks.

1)If a car moves with a uniform velocity in a circle what will it's acceleration be?
2)And If a car moves with a uniform speed in a circle what will it's velocity be?

A 24.0 g ball is fired horizontally with initial speed toward a 100 g ball that is hanging motionless from a 1.10 m -long string. The balls undergo a head-on, perfectly elastic collision, after which the 100 g ball swings out to a maximum angle = 52.0.
What was the initial velocity ?

a ball is dropped on the floor from a height of 10m.It rebounds to a height of 2.5m. If the ball is in contact with the floor for 0.01sec, the average acceleration during contact is.

An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.