Answer:
Explanation:
Given that,
Mass of a uniform rod, m = 12 kg
Length of the rod, l = 0.3 m
The moment of inertia rotating about an axis perpendicular to the rod and passing through the center of the rod is given by :
So, the moment of inertia of the rod is
Answer:
Force,
Explanation:
Given that,
Mass of the bullet, m = 4.79 g = 0.00479 kg
Initial speed of the bullet, u = 642.3 m/s
Distance, d = 4.35 cm = 0.0435 m
To find,
The magnitude of force required to stop the bullet.
Solution,
The work energy theorem states that the work done is equal to the change in its kinetic energy. Its expression is given by :
Finally, it stops, v = 0
F = -22713.92 N
So, the magnitude of the force that stops the bullet is
Answer:
Net force.
Explanation:
All of the forces acting on an object combine to create a net force.
1,000 milligrams = 1 gram
2,000 milligrams = 2 grams
3,000 milligrams = 3 grams
4,000 milligrams = 4 grams