Ch 4: Mechanics I Flashcards
1
Q
True or False?
An unbalanced force on an object will always change the object’s direction.
A
False. It could change the speed without changing its direction.
2
Q
True or False?
An unbalanced force on a body will always impact the object’s speed.
A
False. It will always impact the VELOCITY, but it could change only the speed or only the direction.
3
Q
[Inclined planes]
the force due to gravity acting parallel to the inclined plane = ________
A
mg sin θ
4
Q
[Inclined planes]
the force due to gravity acting perpendicular to the inclined plane = ________
(use this when calculating the normal force)
A
mg cos θ
p. 88
