- Conservation of linear momentum : Pi=Pf.
- Initial momentum Pi=0 as the gun and the bullet do not move.
- Final momentum Pf=mgVg+mbvb.
- ∴ 0=mgVg+mbvb.
- ⇒0=8Vg+(0. 01)(400)
- ⇒∣Vg∣=0. 5 m/s.
Table of Contents
What is the formula for the ballistic pendulum?
(M +m)v2, where M is the mass of the pendulum, m is the mass of the ball, and v is the speed of the center of mass of the combined system after the collision.
When a bullet is fired in to a wooden block which one of the following is conserved?
The momentum of the bullet would be inside the wooden block, hence conserving the overall momentum.
How do you find the initial speed of a bullet from a ballistic pendulum?
Is a ballistic pendulum elastic or inelastic?
In the case of the ballistic pendulum, the collision is inelastic because the bullet is embedded in the block.
What is the velocity of a bullet?
New York: World Book, 1998. “The velocity (speed) of rifle bullets varies between 600 and 5000 feet (180 and 1500 meters) per second. Some bullets can hit targets as far away as 6000 yards (5000 meters).”
Which two principle of physics are applied to find the velocity of the bullet?
The velocity of the bullet could then be calculated from the known masses of the bullet and block, and from the maximum height reached by the block after impact. Two fundamental principles of physics are used in the calculation: conservation of momentum and conservation of energy.
What happens to the kinetic energy in a ballistic pendulum?
By measuring the height of the pendulum’s swing, the potential energy of the pendulum when it stops can be measured. In the case of a pendulum total mechanical energy is conserved. So kinetic energy of the pendulum (after firing) is fully converted to potential energy.
What is the equation for calculating kinetic energy?
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
What is the principle used in the analysis of a collision?
The principle of conservation of momentum states that if two objects collide, then the total momentum before and after the collision will be the same if there is no external force acting on the colliding objects.
What type of energy conversion takes place when a bullet was fired?
When a bullet moves through the air it gains kinetic energy and releases some of the kinetic energy to the air friction. When the bullet hits the target, the target and bullet both get deformed and the kinetic energy of the bullet gets converted to heat energy.
When a bullet is fired from a gun it pierces through a wooden plank but the same bullet when thrown with hand Gerdly scratches it Expain Why?
Solution : When a bullet is fired from a gun, its velocity is very large compared to when it is thrown with a hand. When velocity is large, its liner momentum is large. Therefore, it may pierce through the person and kill him.
How does a bullet pierce a wooden block?
When the bullet is fired, wooden block has zero kinetic energy, as it is assumed at rest, and all the KE is due to speed and mass of bullet. When bullet gets imbedded in the wooden block, a part of the energy will be required to make a hole in the wooden block where the bullet will get embedded.
What is the speed of the bullet block system after the collision?
Example 3: Bullet and Block – Finding an Initial Velocity After the collision, the bullet + block has a speed of 1.2 m/s.
What is the momentum of the bullet before collision What is the momentum of the wooden block before collision?
The momentum of the block/bullet system is conserved. Therefore, the momentum before the collision is the same as the momentum after the collision.
How do you calculate momentum?
The Momentum Calculator uses the formula p=mv, or momentum (p) is equal to mass (m) times velocity (v).
Why is ballistic pendulum inelastic collision?
On the other hand, in an inelastic collision, momentum is conserved and the two objects stick together after the collision. In the case of the ballistic pendulum, the collision is inelastic because the bullet is embedded in the block.
Is kinetic energy conserved in a ballistic pendulum?
The ballistic pendulum is a device in which a projectile such as a bullet is fired into a suspended heavy wooden stationary block. Some kinetic energy gets transformed into heat and sound, and some is used to deform the block. However, momentum is conserved.
What type of collision is a ballistic pendulum?
The ballistic pendulum is a practical device in which an inelastic collision takes place.
What is the fastest bullet?
The . 220 Swift remains the fastest commercial cartridge in the world, with a published velocity of 1,422 m/s (4,665 ft/s) using a 1.9 grams (29 gr) bullet and 2.7 grams (42 gr) of 3031 powder.
What is faster bullet or sound?
The fastest bullets travel more than 2,600 feet per second. That’s equivalent to over 1,800 miles per hour. To put that in perspective, it’s amazing to realize that bullets travel over twice the speed of sound!
What is recoil velocity in physics?
When you fire a bullet from the gun, the gun experience a force in the backward direction. Because of this force, the gun attains a velocity in the backward direction. This velocity is known as recoil velocity.
Is recoil velocity always negative?
Note: Recoil velocity will always be negative as the gun will always move in the opposite direction of the fired bullet.
What is recoil physics?
Physics. (of an atom, a nucleus, or a particle) to undergo a change in momentum as a result either of a collision with an atom, a nucleus, or a particle or of the emission of a particle. noun. an act of recoiling. the distance through which a weapon moves backward after discharging.
Which physical principle can be used to find required velocity of a gun while firing a bullet?
Answer. Answer: principle of conservation of linear momentum.