two balls each with with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in this col
2 answers:
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Answer:
1.628
Explanation:
Anywhere in the universe, In a closed system, <u>Conservation of energy</u> is applicable.
In this case
Neil is initially on the surface of moon and has a velocity of 1.51 in upward direction.
⇒He has Kinetic energy= =
J
But with respect to the surface of the moon,
where m=mass of moon
v=velocity of Neil
He has Potential energy= =0 J
At the highest point of his jump, his velocity =0
⇒ Kinetic energy==0 J
His Potential energy with respect to the surface of moon==
where m=mass of moon
g= gravitational acceleration on moon
h=height from moon's surface
By Conservation Energy Principle
+
=
+
+0=0+
=
=
J=
⇒ g = = 1.628
Answer:
Explanation:
Since this is not parabolic motion, it is one-dimensional motion. Very simple. What we are given is
mass: 15.0 kg
initial velocity: 2.0 m/s
acceleration: .75 m/s/s
time: 6.0 seconds
Since we are looking for final velocity, the equation we need for this is
v = v0 + at that says final velocity is equal to the initial velocity plus the acceleration of the object times how long it travels. We don't have a need for the mass here at all.
Notice that one of the seconds labels to the right of the plus sign cancel out, leaving us with like units...which we HAVE to have if we want to add.
Simplifying a bit gives us
v = 2.0 m/s + 4.5 m/s so
v = 6.5 m/s