3.1 - Newton's Laws

Question 1

Change in velocity of an object is caused by

Answer 1

Forces

Question 2

Equilibrium

Answer 2

When the velocity is constant or the object is at rest

Question 3

Contact Forces

Answer 3

Forces that result from physical contact between two objects

Question 4

Field Forces

Answer 4

Forces that can act at a distance (ex. gravity)

Question 5

Force is a

Answer 5

Vector

Question 6

Free Body Diagrams

Answer 6

Shows the only forces acting on a single object

Question 7

Newton’s First Law

Answer 7

A body at rest will remain at rest, a body in motion will remain in motion, traveling with a constant velocity in a straight line, unless an unbalanced force acts on it

Question 8

Inertia

Answer 8

A measure of the body’s ability to resist changes in velocity

Question 9

MASS =

Answer 9

INERTIA

Question 10

Newton’s Second Law

Answer 10

F=ma

Question 11

The acceleration of an object is directly proportional to the resultant ______ acting on it and inversely proportional to its ________.

Answer 11

Force, mass

Question 12

Direction of acceleration

Answer 12

In the direction of the resultant force

Question 13

SI unit of force

Answer 13

Newton

Question 14

Newton’s Third Law

Answer 14

For every action, there is an equal and opposite reaction

Question 15

If no unbalanced force acts on a body

Answer 15

its acceleration is zero