A pendulum made of a string of length 11.6 m and a spherical bob of mass 2.8 kg is
able to swing in a vertical plane. The pen-
dulum is released from an angular position
38° from vertical as shown in the figure be-
low. The string hits a peg located a distance
5 m below the point of suspension and swings
about the peg up to an angle a on the other
side of the peg. Then, the bob proceeds to
oscillate back and forth between these two
angular extremities.
The acceleration of gravity is 9.8 m/s?.

the diagram which shows forces as either balanced = same speed or unbalanced = accelerarting

explanation:

newton's third law, for every action there is an equal and opposite reaction.

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.