100
choose all correct statements about the effects of gravity of earth, the moon, and within space.
the moon has less gravitational force than earth because it is smaller and has less mass.
the orbit of each planet in the solar system is controlled by its moon(s).
earth's tides are affected most by the sun's gravitational force.
mass is the force that holds people and objects to the earth's surface.
the sun's gravitational pull is what keeps the planets in its solar system in orbit.
the sun has more gravity than any planet in the solar system because it has the most mass.

fith statement

sixth statement

first statement I think

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

c8h10 is your answerr