Recent content by bbreezy

I know X is the "displacement" but I am drawing a blank as to what that number is

I got 9.1125... i did 1/2(62.5)(.540^2)

Homework Statement A 27.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 17.00 m. When she is partway down the slide, at a height h2 of 7.00 m, she is moving at a speed of 7.50 m/s. Calculate the mechanical energy lost due to friction (as heat, etc.)...

Homework Statement The potential energy stored in the compressed spring of a dart gun, with a spring constant of 62.50 N/m, is 0.540 J. Find by how much is the spring is compressed. Homework Equations I know that F=-k*change in x and also spring= 1/2kx^2 The Attempt at a Solution...

Vi+2ad = 0 14.1+2(a)(198) = 0 2(a)(198) = -14.1 then this is where I think I am messing up

The coefficent of static friction between the floor of a truck and a box resting on it is 0.40. The truck is traveling at 82.9 km/hr. What is the least distance in which the truck can stop and ensure that the box does not slide? No idea where to even start...

I am having trouble with this problem, it states: A hockey puck on a frozen pond with an initial speed of 14.1 m/s stops after sliding a distance of 198.9 m. Calculate the average value of the coefficient of kinetic friction between the puck and the ice. I tried using the equation uk=a/g...