# What does a ball of mass 4kg moving on a smooth horizontal surface make?

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## What does a ball of mass 4kg moving on a smooth horizontal surface make?

A ball of mass 4 kg moving on a smooth horizontal surface makes an elastic collision with another ball of mass m at rest in the line of motion of the first ball. If after collision first ball moves in the same direction with one fourth of its velocity before collision, then the mass of second ball is: (1) 4 kg.

## Is the momentum of an isolated system conserved?

For any collision occurring in an isolated system, momentum is conserved. The total amount of momentum of the collection of objects in the system is the same before the collision as after the collision.

## How does the final momentum of an inelastic collision compare to the initial momentum?

In both of these collisions, the system’s total momentum is conserved, which means that the total momentum before the collision is equal to the total momentum after the collision. Therefore, In an inelastic collision of an isolated system, the final momentum is exactly the same as the initial momentum.

## When a ball is moving on a smooth horizontal surface?

Expert-verified answer Balanced force is acting on a ball moving over a horizontal smooth surface with constant velocity. If the resultant of several forces acting on the body is zero, then the forces are known as balanced forces. They don’t change the speed of a moving object.

## What is a ball of mass 2kg is dropped from a high building?

Expert-Verified Answer answer is 384 joules {Ans.}

## What is a closed and isolated system in momentum?

The law of conservation of momentum says that the momentum of a closed system is constant in time (conserved). A closed (or isolated) system is defined to be one for which the mass remains constant, and the net external force is zero. The total momentum of a system is conserved only when the system is closed.

## Is momentum a form of energy?

Momentum is NOT a form of energy; it is simply a quantity which proves to be useful in the analysis of situations involving forces and impulses. b. TRUE – If an object has momentum, then it is moving. If it is moving, then it has kinetic energy.

## What is meant by isolated system?

A system that does not allow the exchange of either energy or matter with the surroundings is called an isolated system. An isolated system is a thermodynamic system that cannot exchange either energy or matter outside the boundaries of the system.

## What are the 2 types of collision?

- Inelastic collisions: momentum is conserved,
- Elastic collisions: momentum is conserved and kinetic energy is conserved.

## Why is conservation of momentum true?

For two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed. The principle of conservation of momentum is a direct consequence of Newton’s third law of motion.

## Is it possible for a collision to conserve kinetic energy without conserving momentum?

Note: In collisions between two isolated objects momentum is always conserved. Kinetic energy is only conserved in elastic collisions. We always have m1v1i + m2v2i = m1v1f + m2v2f.

## When a particle of mass 2 kg moves on a smooth horizontal plane?

A particle of mass 2kg moves on a smooth horizontal plane under the action of a single force→F=(3^i+^j)N. Under this force it is displaced from (0,0) to (1m,1m). The initial speed of the particle is √3m/s and final speed is √5km/s.

## What happens to the speed of a ball on a horizontal surface?

If the horizontal surface is really smooth (i.e. frictionless) the speed of the ball will not change.

## How much force is required for a ball having 4 kg mass to increase velocity of 1.5 Metre per second at every second?

F = 4 × 1.5 = 6 N .

## What is the displacement of a body of mass 1 kg on a horizontal smooth surface as a function of time t?

The displacement of a particle of mass 1kg on a horizontal smooth surface is a function of time given by x=1/3t^3 .