mechanics Flashcards
1
Q
definition of the moment of a force
A
the turning effect of a force on an object
2
Q
formula for moment
A
magnitude × perpendicular distance from the axis of rotation
3
Q
conditions for an object to be in equilibrium
A
- resultant force is 0
- resultant moment is 0
4
Q
uniform rod
A
weight acts from centre of rod
5
Q
initial velocity when an object is dropped
A
0
6
Q
How have you used the fact that the string is inextensible in a pulley?
A
By using the same magnitude acceleration for both sides.
7
Q
How have you used the fact that the pulley is smooth?
A
By using the same tension magnitude on either side of the pulley.
8
Q
When a rod is on the point of tilting about a pivot, what is the reaction at any other support?
A
0
9
Q
horizontal acceleration in projectiles
A
0
10
Q
vertical initial velocity in horizontal projectiles
A
0
