object pulling downward of the Earth with force mg
An object of mass m rests on a flat table. The earth pulls on this object. With a force magnitude mg. What is reaction force to this pull?
greater then the weight of the elevator
An elevator suspended by vertical cable is moving downward but slowing down. The tension in the cable must be
false
In order to get an object moving, you must push harder on it than it pushes back on you. T or F
False
A box is placed on a table which rests on the floor. The box pushes on the table, the reaction force to the box's push on the table is the table's push on floor. T or F
Net force
is VECTOR sum of all the individual forces that act on it.
Mass
What is directly related to inertia?
inertia
is the tendency of an object to resist any change in its motion
Acceleration must be doubled
If force is doubled, what happens to acceleration?
Acceleration is half
If mass is doubled, what happens to acceleration?
apparent weight decreases
What happens to apparent weight when accelerate downward?
apparent weight increases
What happens to apparent weight when slow down going downward?
apparent weight increases
What happens to apparent weight when accelerate upward?
apparent weight decreases
What happens to apparent weight when slow down upward?