In lecture, it was discussed measurements of mass, temperature, time, volume and length. which of these is not an si base unit (
1 answer:
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Answer:
The initial speed of bullet is "164 m/s".
Explanation:
The given values are:
mass of bullet,
or,
mass of wooden block,
speed,
Coefficient of kinetic friction,
As we know,
The Kinematic equation is:
⇒
then,
Initial velocity will be:
⇒
On substituting the given values, we get
⇒
As we know,
The conservation of momentum is:
⇒
or,
⇒ Initial speed,
On substituting the values, we get
⇒
⇒
⇒
Answer:
Part A
Newton's 3rd law states that action and reaction are equal and opposite, mathematically, we have;
= -
Where;
= The action force
= The reaction force
Part B
The law indicates that the force with which a rocket ship uses in taking off from the Earth, is equal in magnitude, and opposite in direction to the reaction force of the Earth to the motion of the rocket, (-)
Part C
The law is a universal law, and it will also affect the rocket ship in space, as the force of the jet from the exhaust is directed towards Earth while in space, the rocket is propelled deeper into space
Explanation: