Answer:

Explanation:
By energy conservation and work energy theorem we can say that after bullet hits the block, it will move on the rough floor and comes to rest
so here work done by frictional force = change in kinetic energy
so we know that





now by momentum conservation we have



Boyle’s law is P1V1 = P2V2. This shows that pressure and volume have an inverse relationship, so increase in pressure causes a decrease in volume. B is your answer
Answer:
Explanation:
The head decelerates from 4 m /s to zero in .2 sec so deceleration = 4 - 0 / .2
= 20 m/s²
If F be the average force acting on head
F - mg = ma
F = m ( g + a )
= 65 ( 9.8 + 20 )
= 1937 N .
This force will be uniformly acting on head in upward direction . So during first half and second half , deceleration is same hence force F will also be same .
<span>A pliable sheetlike structure acting as a boundary, lining, or partition in an organism.</span>
Answer:
The correct answer is the spring constant (k)
Explanation:
- Elastic potential energy: Epe = ½ * k * Δx²
k = spring constant
Δx = displacement
- Gravitational ptential energy: Ep = m*g*h
g = (acceleration due to gravity)
m = mass
h = relative height of an object to some reference point