Momentum and Universal Forces

Momentum (Conceptually)

100

What does momentum depend on?

Mass and velocity

200

What are the units of momentum?

kgm/s

300

What is a change in momentum called?

Impulse

400

What are the units of impulse?

Ns

500

What is the difference between an elastic and an inelastic collision?

Elastic: bounce off

Inelastic: stick together

Momentum (Mathematically)

100

What is the momentum of a 100 kg person running at 5 m/s?

500 kgm/s

200

What is the velocity of an object with momentum 20 kgm/s and mass 10 kg?

2 m/s

300

A pool ball with mass 0.5 kg and velocity 30 m/s hits a bowling ball with mass 5 kg. How fast will the bowling ball be moving after the collision?

3 m/s

400

A 50 g golf ball is hit by a 300 g driver and travels downrange at 60 m/s. What was the velocity of the driver at its point of contact with the ball?

10 m/s

500

A 10000 kg railroad car travelling at 5 m/s hits a railroad car of unknown mass which is travelling at 2 m/s, links with it, and results in them travelling together at 3 m/s. What is the mass of the second railroad car?

20000 kg

Universal Force of Gravitation

100

What variables affect the force due to gravity between two bodies?

Their masses and distance apart

200

What is the equation for Newton's Law of Universal Gravitation?

F_g = Gm₁m₂/r²

300

What units are used to represent force due to gravity, distance, and mass in Newton's Universal Law of Gravitation and what letters represent them?

Newtons (N), meters (m), and kilograms (kg)

400

What are the units of the gravitational constant?

Nm²/kg²

500

Set up an equation to solve for the gravitational constant:

G = F_gr²/m₁m₂

Coulomb's Law

100

What variables affect the electrical force between two objects?

Their charges and the distance between them

200

What is the equation for Coulomb's Law?

F_e = kq₁q₂/r²

300

What unit is used to measure charge and what letter represents it?

C, Coulombs

400

What units are used to represent Coulomb's constant?

Nm²/C²

500

Set up an equation to solve for Coulomb's Constant:

k = F_er²/q₁q₂

Universal Forces (General)

100

Which of the Universal Forces is the strongest?

Strong Nuclear Force

200

Which Universal Force acts over the largest distance?

Gravitational

300

Which of the Universal Forces can attract as well as repel?

Electromagnetic/Electrical

400

Which of the Universal Forces is responsible for radioactive decay?

Weak Nuclear Force

500

DAILY DOUBLE

Describe the process of radioactive decay: what happens to the subatomic particles in a nucleus and what is the outcome of this process