A250 kg ball sits on a frictionless track inclined at an angle of 45 ◦ as shown in fig. 3. what is the magnitude of the force (f ) needed to keep the ball in place?

answer: he got 23

explanation:

a and c

c is 100% but i am confused in a

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.