Recent content by Ering

Homework Statement A 70-kg skier is in a tuck position and moving down a 20-degree hill. Air resistance applies a resultant force of 15 N against the movement of the skier. The coefficient of friction between the skis and the snow is 0.09. What is the resultant downhill force acting on the...

Homework Statement A balloon used for a physics experiment has a radius of 3.15m and is filled with helium. The total mass of the balloon is 15.2kg and the density of the surrounding air is 1.28 kg/m3. a. How much buoyant force is acting on the balloon? b. When the balloon is released from the...

Hello, I'm looking for any ideas that you geniuses may have! We have to design a device that will catch a (hardboiled) egg from 7 meters high. It can be made from any material/objects but must be under 5 cm tall (the sides can be as wide as wanted) and must be self-supporting. The device will...

For the equation for the time it takes to fall distance h, would you use Δy = Voy t + 1/2 a t2 ? where Δy = h If so, would you set that equal to the equation you gave above? Or how do I make it so terms can cancel out?

For the equation for the time it takes to fall distance h, would you use Δy = Voy t + 1/2 a t2 ? where Δy = h If so, would you set that equal to the equation you gave above? Or how do I make it so terms can cancel out?

Homework Statement [/B] Ally starts at rest with a height H above the ground and slides down a frictionless slide. The bottom of the slide is a height h above the ground. Ally then leaves the slide horizontally, striking the ground a distance d from the end of the slide (where she left the...

I'm also working on this question for homework. For the velocity vs. time graph, does your constant negative line start at some velocity above zero and stop at zero? Or does it go past zero into a negative, or does it start at zero and go down? Wasn't very good at drawing these for the test...

speed = distance / time so 4.67m / 0.543s but how do you get the acceleration from that?