Question
solve number 1
Determine the work done by the frictional force in moving a block of mass m from point 1 to point 2 over the two paths shown in the following figure. The friction force is a constant on the surface of the path. How far would you have to stretch a spring with k =1.5kN/m for it to store 200 J of Space explorer land on a planet that has the same mass as Earth, but find their twice as much as they would on Earth. What is the planet's radius Earth's distance from the Sun varies from 1.47X10^11m at perihelion to 1.52X10^11n because its orbit is not quite circular. Find the change in potential energy a h goes from perihelion to aphelion.28-kg child sits at one end of a 4.0m-long seesaw. Where should his 65-kg fat that the center of the mass will be also at the center of the seesaw alpha particle (^4He) strikes a stationary Uranium nucleus (^2^3^5U)head-on and What fraction of the alpha's kinetic energy is transferred to the Uranium
Explanation / Answer
1) Work done From 1 to 2 going along vertical and horizontal = mgL + mgL
= 2mgL
Work done From 1 to 2 going along hypotenuse = mg * sqrt(2)L
= sqrt(2) * mgL
