force, gravity & friction Flashcards
1
Q
effects of forces: forces can change the
A
speed, shape + direction of an object
2
Q
a force of 1N will accelerate
A
a 1KG mass at 1ms-2
3
Q
mass is in
weight is in
A
kg
newtons
4
Q
gravitational force is
A
a force of attraction between objects that have mass
5
Q
gravitational field strength is
A
the gravitational force acting on a unit mass
6
Q
gravitational field strength is in
A
Nkg-1 (newtons per kilogram)
7
Q
frictional forces occur when
A
materials are in contact
8
Q
friction can oppose
A
the motion of objects
