Show:
Newton’s Laws
Friction
Gravity and Gravitation
Uniform Circular motion, and Pendulums
Work and Power
100

Newton’s First Law

The law of inertia

100

Friction always acts in this direction

Opposite motion

100

He discovered the value of G, the gravitational constant 

Cavendish

100

The speed of an object in circular motion is (constant or changing?)

Constant

100

The equation for work is

Wdcos theta

200

Newtons’ Second Law

F=ma

200

Kinetic friction is (affected or unaffected?) by the weight of an object on a surface

Affected

200

An object is more stable if its center of gravity is situated above its _?_

Base of support

200

The velocity of an object in uniform circular motion is (constant or changing)?

Changing

200

The equation for power is 

P=W/t

300

Newton’s Third Law

Action-reaction

300

Kinetic friction is (independent of or dependent on?) the area of contact between the surface and the object

Independent

300
If two objects of the same mass are attracted to each other with a gravitational force of 2, what is the gravitational force of attraction if both objects suddenly double in mass, but remain in the same place?

8

300

An object in uniform circular motion has a velocity of 2 m/s and a radius of the circular motion of 2 m. What is its centripetal acceleration?

2 m/s2

300
Three different ways to write units for work:

Nm, Joules, ft-lb

400

An object moves after being pushed due to Newton’s _?_ Law

What is 2nd

400

Static friction is nearly always (greater than or less than) kinetic friction

Greater than

400

If two objects at a distance 1 m from each other have a gravitational force of attraction of 8, what is the gravitational force of attraction if the same two objects are separated a distance of 2m? 

2

400

What is the equation for the centripetal force for an object of mass m in uniform circular motion, moving at velocity v, in a circle of radius r?

F=mv2/r

400

How much work does the centripetal force do on a person riding a horse on a carousel at distance r from the center, at a velocity of v?

0

500

A rocket operates based on Newton’s _?_ Law

What is 3rd

500

What is the coefficient of static friction between an object of mass m and an incline surface, when the object begins to slide down the surface when at angle X

Tan X

500

What is the value of the gravitational force between two objects, each of mass 1 kg, separated by a distance of r meters? Leave in terms of G.

G

500
If a flying duck takes 2 seconds to traverse its circular path in a circle of radius 1/pi, then what is its centripetal acceleration? 

Pi

500

The work done by a person pulling a 20 N object a distance of 3 meters at an angle of 60 degree is? 

20x3xcos60= 30 Nm