2 Blocks 1 and 2 rest on rough surfaces with coefficient of frictions ¢1 and ¢2 respectively. The blocks are connected by a cable that runs over a smooth pulley and are in equilibrium as shown below with the following values.

W2 = 50N
thetha 1 = 30 degrees
thetha 2= 40 degrees
¢1= 0.3
¢2= 0.25

a. If Block 2 is on the verge of sliding down the plane, what is the minimum weight W1, required for equilibrium?
b. If Block 2 is on the verge of sliding up the plane, what is the minimum weight W1, required for equilibrium
? Do not consider overturning.​

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide