Recent content by catmd13

Homework Statement 80-kg man balances the boy on a teeter-totter as shown. Note: Ignore the weight of the board. What is the magnitude of the downward force exerted on the fulcrum in Newtons? Homework Equations The Attempt at a Solution

i get 180 cm is this correct

I did W=mgh 4.0J=(0.50kg)(9.80)h Im still getting the wrong answer am i using the wrong equation or an error in my math

Homework Statement A physics student shoves a 0.50-kg block from the bottom of a frictionless 30.0° inclined plane. The student performs 4.0 J of work and the block slides a distance s along the incline before it stops. Determine the value of s in cm. Homework Equations...

I used that equation how would i express 63.5kg as a force so i could use it for Fn I am stuck and do not know where to go from here

so they give me Fn= 63.5kg and mg= 72.6kg i plugged it into find ma and i came up with .123 and it is still wrong. Can you help me out and see where i am making my mistake

Homework Statement An archer shoots an arrow horizontally at a target 16m away. The arrow is aimed directly at the center of the target, but it hits 56cm lower. What was the initial speed of the arrow? Homework Equations im not sure of an equation because it does not have t. The...

i used the equation listed above but i get keep getting a wrong answer. i used 160lb for Fn and 123 for mg i not really sure what to use for ma. I was also wondering if I should change the units from pounds

Homework Statement When you weigh yourself on good old terra firma (solid ground), your weight is 160lb . In an elevator your apparent weight is 140lb. What is the magnitude of the elevators acceleration. Homework Equations For this problem would we use the equation Fn= mg+ma The...