Physics: What Do You Know?
An object has energy, but it does not have force.
True
False
Forces that are applied to an object in the opposite direction _________________ one another.
Counteract
Same
Reinforce
Different
When an object is moving at a constant speed there must be __________________.
Unbalanced forces acting vertically
Unbalanced forces acting horizontally
No unbalanced forces
No forces at all
Forces are useful to explain motion on a moment-to-moment basis; energy is especially useful for describing beginning-to-end changes.
True
False
After the ball is dropped straight down what forces are acting upon it?
Contact and gravitational
Contact force
Gravitational force
None of the above
Free body diagrams only show the forces ___________________.
The object applies to others
Acting on the object
Acting on its surroundings
The object applies to its mass
Speeding up is caused by the unbalanced forces acting __________________.
Against the direction of motion
In the direction of motion
Equal and opposite
None of the above
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