Chapter 5- Speed And Forces Flashcards
1
Q
Define speed
A
A way of saying how fast an object is moving
2
Q
Calculating speed
A
Speed= distance/time
3
Q
Speed units
A
m/s
4
Q
Define acceleration
A
The change of velocity rate
5
Q
Acceleration units
A
m/s2
6
Q
Force units
A
Newtons (N)
7
Q
Define weight
A
The force on an object due to mass and the amount of gravity
8
Q
Define mass
A
The amount of matter an object has
9
Q
Weight units
A
Joules (J)
10
Q
Mass units
A
Kg or g
11
Q
State Newton’s first law
A
An object will continue to be either stationary or move in a straight line at a constant speed, unless there is an unbalanced force acting upon it
12
Q
State Newton’s 2nd law
A
The total force on an object is directly proportional to its mass x acceleration
13
Q
State Newton’s 3rd law
A
For every action there is an equal and opposite reaction
