When does the fall equinox occur in the northern hemisphere
1 answer:
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Answer:
(a) -472.305 J
(b) 1 m
Explanation:
(a)
Change in mechanical energy equals change in kinetic energy
Kinetic energy is given by
Initial kinetic energy is
Since he finally comes to rest, final kinetic energy is zero because the final velocity is zero
Change in kinetic energy is given by final kinetic energy- initial kinetic energy hence
0-472.305 J=-472.305 J
(b)
From fundamental kinematic equation
Where v and u are final and initial velocities respectively, a is acceleration, s is distance
Making s the subject we obtain
but a=\mu g hence
Answer:
Explanation:
As we know by energy conservation that change in gravitational potential energy of the system = change in kinetic energy of the two ball
So here we can say
Also since there is no external force on the system of two masses so here total momentum of the two balls will remains conserved
now we have