here at the moment when bullet strikes the block it will have no external force on it
so here we can use momentum conservation
so we will have
so they move together with speed 1.98 m/s
When a the irregularities of one surface come into contact with those of another surface ,occurs
1 answer:
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Answer:
2.943 J
Explanation:
Data:
acceleration due to gravity, g = 9.81 m/s²
mass of sand = 0.5 kg
distance = 0.6
Thermal energy = the energy possessed by the falling sand
The force of sand = ma
=
However, the energy is given as the force multiplied by the distance, so
E =fd
Therefore, the thermal energy is 2.943 joules
Answer:
128 N
Explanation:
Power can be defined as
<em>F</em> is the force and <em>v</em> is the velocity.
According to the question, <em>P</em> = 5.15 hp = 5.15 × 746 W.
<em>v</em> = 30 m/s
Since most of the power is used to compensate for the energy transformations due to friction forces, the total frictional is 128 N