Force
What is the unit measurement for force?
Kilogram
Newton
Meter
Joule
Newton
A motion graph shows-
the objects path at given times and distances
A simple machine helps-
the total distance traveled by an object over a total amount of time
Average Speed
Which is the formula for calculating average speed?
Average speed= total volume/total mass
Average speed=total time/ total distance
Average speed= total mass * total acceleration
Average speed= total distance/ total time
Average speed= total distance/total time
A balanced force is one where there is no ___?___
motion
Which of the following is an example of motion:
a house
a tree
a baby crawling
a person standing
a baby crawling
A lever has three parts- a fulcrum, a load, and an __?__.
Effort
energy of motion
Kinetic
How far an object has traveled is known as:
Distance
Which is an unbalanced force example:
Pushing a lawnmower
a car traveling at a constant speed
a person sitting in a chair
a book sitting on a shelf
Pushing a lawnmower
We have talked about a few motion graphs. Was a time vs. acceleration one?
no
A car is an example of which type of simple machine?
Wheel and axle
unequal forces on an object that may result in a change in position, direction, or motion
Unbalanced Forces
True or False-
Moving at a constant speed is an example of balanced forces?
True
Net force is the ___?___ amount of force on an object.
Total
on a distance vs. time graph, the steeper the line, the ___?___ the object is going.
faster
steepness means an increase in speed
Which of the following contains only simple machines?
screw, doorstop, car
wedge, inclined plane, screw
pulley, lever, pencil sharpener
wheel and axle, pulley, bicycle
wedge, inclined plane, and screw
when an object’s speed remains unchanged
Constant Speed
Instantaneous speed is the speed of an object at a specific time.
True
What's the Net Force:
2 arrows in the same direction both exerting 30 N of force
60 N
A flat, horizontal line on a distance vs time graph represents-
no movement
True or False-
A compound machine consists of two or more simple machines.
True
change in an object’s motion (position, direction, speed); caused by unbalanced forces
Acceleration
True of False-
The shorter the length of an inclined plane or ramp, the less force required to move an object.
False