A 0.4-kg toy train car moving forward at 3 m/s collides with and sticks to a 0.8–kg toy car that is traveling in the opposite di
1 answer:
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Answer:
The right answer is:
(a) 63.83 kg
(b) 0.725 m/s
Explanation:
The given query seems to be incomplete. Below is the attachment of the full question is attached.
The given values are:
T = 3 sec
k = 280 N/m
(a)
The mass of the string will be:
⇒
or,
⇒
On substituting the values, we get
⇒
⇒
⇒
(b)
The speed of the string will be:
⇒
then,
⇒
On substituting the values, we get
⇒
⇒
⇒
⇒
Answer:
Explanation:
Using Kepler's third law, we can relate the orbital periods of the planets and their average distances from the Sun, as follows:
Where and
are the orbital periods of Mercury and Earth respectively. We have
and
. Replacing this and solving for