# Why did Ellen Hopkins write the book crank?

## Why did Ellen Hopkins write the book crank?

Crank was inspired by the life of Ellen Hopkins’s daughter, Cristal, who was addicted to meth. In an email from the author, Ellen Hopkins said her daughter had been clean for four years, as of 2017, but has also spent 18 months in prison.

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## Can a lighter object have more momentum than a heavier one how?

8.1 Linear Momentum, Force, and Impulse Can a lighter object have more momentum than a heavier one? How? No, because momentum is independent of the velocity of the object. No, because momentum is independent of the mass of the object.

## How do you use impulse-momentum theorem?

Summary

1. The impulse-momentum theorem states that the change in momentum of an object equals the impulse applied to it. J = ∆p.
2. If mass is constant, then… F∆t = m∆v.
3. If mass is changing, then… F dt = m dv + v dm.
4. The impulse-momentum theorem is logically equivalent to Newton’s second law of motion (the force law).

## Which undergoes the greatest change in momentum?

The greatest change in momentum occurs when the baseball is caught and thrown back.

## What is the impulse-momentum theorem?

Impulse-Momentum Theorem: When a net. force acts on an object, the impulse of the net. force is equal to the change in momentum of. the object: F ∆t = m−→

## What is the momentum principle?

Momentum is the quantity of motion of a moving body. It is expressed mathematically as p = m * v and has units of kg m/s. The principle of conservation of momentum states that in an isolated system, two objects that collide have the same combined momentum before and after the collision.

## What is the difference between acceleration and momentum?

The key difference between acceleration and momentum is that acceleration refers to the rate of change in velocity of a moving object, whereas the momentum of an object is the product of the mass of the object and its velocity.

## What is momentum and what is its unit?

In symbols, linear momentum p is defined to be p = mv, where m is the mass of the system and v is its velocity. The SI unit for momentum is kg · m/s. Newton’s second law of motion in terms of momentum states that the net external force equals the change in momentum of a system divided by the time over which it changes.

## Why is momentum always conserved?

Impulses of the colliding bodies are nothing but changes in momentum of colliding bodies. Hence changes in momentum are always equal and opposite for colliding bodies. If the momentum of one body increases then the momentum of the other must decrease by the same magnitude. Therefore the momentum is always conserved.

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