Un treno si muove per un certo tratto rettilineo con moto uniformemente accelerato (a = 15 m/s^2). Un oggetto di massa m = 2,0 kg rimane in quiete nonostante l'accelerazione del treno grazie all'attrito con il pavimento. Quanto vale il modulo della forza d'attrito?

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

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.

the ima (higher than 1m) will be greater than the ima with the height of 1m.