# 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.

## When a bullet hits a wooden block what is the problem?

A bullet is fired into a wooden block, this is a macroscopic collision (can be seen with naked eyes). In such collisions, some part of kinetic energy is turned into vibrational energy of the atoms which in turn can further convert into heat energy. Such collision is also known as an inelastic collision.

## When a bullet is fired in to a wooden block which one of the following is conserved?

In such collisions, energy(kinetic energy) is lost and is therefore not conserved. But, the momentum of the system is conserved in every collision .

## When a bullet enters a wooden block on a smooth horizontal surface which is are conserved?

2) Momentum will be conserved since there is no external force.

## 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).”

## What is the momentum of the bullet before collision What is the momentum of the block of wood after 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.

## 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.

## Does the change in momentum of the bullet equal that of the block of wood?

According to the law of conservation of linear momentum the momentum of the bullet and the block before the hit will be equal to the momentum of the block with the bullet after the hit.

## What is the speed of the bullet and the block immediately after the impact?

Solution : We know , by conservation of momentum . Therefore , the speed of the bullet and the block immediately after the impact is 30 m/s .

## What is the speed of the bullet when it exits the block?

The speed of the bullet when it exits the block is 104 m/s Since it is an inelastic collision, the bullet hits and passes through the block, therefore energy is lost in the heat and deformation of the bullet and block. Thus, the final kinetic energy is less than the initial kinetic energy.

## 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 striking a block gets embedded in it then the nature of collision is?

When a bullet strikes a wooden block and embedded in it, then such type of collision is an example perfectly inelastic collision. In this type of collision, maximum loss of kinetic energy occurs.

## When a bullet hits and embedded in a solid block resting on a horizontal frictionless table then which quantity is conserved?

As the bullet gets embedded in the solid block, whole of its kinetic energy gets lost. This will be perfectly inelastic collision in which only momentum is conserved.

## Can a bullet have the same momentum as a truck?

Section 1 Impulse and Momentum: Mastering Concepts SOLUTION: Yes, for a bullet to have the same momentum as a truck, it must have a higher velocity because the two masses are not the same.

## How fast is an AK 47 bullet?

Ballistics. The standard AK-47 or AKM fires a 7.62 × 39 mm round with a muzzle velocity of 710 metres per second (2,329 ft/s). Muzzle energy is 1,990 joules (1,467 ft·lbf). Cartridge case length is 38.6 millimetres (1.5 in), weight is 18.21 grams (281.0 gr).

## Is it possible to dodge a bullet?

Bullet dodging, Scientific American reports, is one such make-believe ability invented by Hollywood. Regardless of your speed and finesse, no human can dodge a bullet at close range. The bullet is simply traveling too fast. Even the slowest handguns shoot a bullet at 760 miles per hour, SciAm explains.

## Which physical principle can be used to find recoil velocity of gun while firing a bullet?

Explanation: Law of conservation of momentum: For a collision occurring between two objects in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. From this, we can find the recoil velocity.

## Why the recoil velocity of a gun is much less than the velocity of the bullet?

Since the mass of the gun is much greater than the mass of the bullet therefore, the velocity of recede of the gun is much less than the velocity of the bullet. That is why gun recoils or moves backwards.

## What is the speed in m s of the bullet block combination after the collision?

Example 3: Bullet and Block After the collision, the bullet + block has a speed of 1.2 m/s.

## What is the momentum of the colliding objects before and after collision?

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

## What is the relationship between momentum and collision?

When two objects collide the total momentum before the collision is equal to the total momentum after the collision (in the absence of external forces). This is the law of conservation of momentum. It is true for all collisions.

## Why does a bullet when fired against a glass window pane make a hole in it?

When the bullet strikes the glass the part of the glass coming in contact with the bullet immediately shares the large velocity of the bullet and makes a hole in it while the rest of the glass pane due to inertia of rest remains at rest and so is not smashed.

## When a bullet is fired on a glass window it makes a clean hole but when a stone is thrown on the window it breaks explain?

Due to the bullet fired on the glass, the momentum of the glass changes but the change in momentum is not as large as the bullet is in contact with the glass window for a very short time. Hence, the bullet makes a clear hole in the glass and passes through it.