Answer:
Answered
Explanation:
According to the impact theory, a glancing collision between a Mars-sized object and Earth led to the formation of the Moon. The iron core of Earth had formed before this collision, leading to the similarity between the composition of the Moon and Earth's mantle. After the collision, any iron core of the Mars-sized object would have been left behind on Earth and eventually merged with Earth's core. The Moon then formed out of the debris thrown into space by the collision.
Whenever the motion of an object <em><u>changes</u></em> . . . speeding up, or slowing down,
or changing direction . . . that change is called "<em><u>acceleration</u></em>". Acceleration is
produced by force on the object.
If there is <em><u>no force</u></em> on the object, then there is no acceleration. That means that
its motion <em><u>doesn't change</u></em>. The object remains in constant, uniform motion ...
moving with steady speed, in a straight line.
No force is necessary to <em><u>keep</u></em> an object moving, only to <em><u>change</u></em> its motion.
Answer:
D
Explanation:
the formula is F=mgh
so now you can write it like
m= 4×50=200
200×1.5×10=30000
Answer:
568.16J
Explanation:
V = 1.4 m/s
h = 2.15m
H = 12.4m
M = 57.0kg
Fr = 41.0N
Vb = 6.80m/s
g = 9.8m/s²
K.E at the top + P.E at the top + Work done = K.E at the bottom + frictional force.
½mv² + mgh + W = ½mVb + Fr.H
(½* 57 * 1.4²) + (57 * 9.8 * 2.15) + W = (½ * 57 * 6.8²) + (41 * 12.4)
55.86 + 1202.22 + w = 1317.84 + 508.4
1258.08 + w = 1828.24
W = 1826.24 - 1258.08
W = 568.16J
