Show:
#0-0# Motion #0-0#
^.^ Friction ^.^
@.@ Force @.@
=^-^= Speed =^-^=
$-$ Mass/Weight $-$
100
What is an objects change in position relative to a reference point?
Motion.
100
What is friction?
Friction is a force that opposes motion between two surfaces.
100
What is force?
A push or pull.
100
How do you find average speed?
Average speed= Total distance/total time.
100
What is gravity?
The force of attraction between objects because of their masses.
200
What is an object that appears to stay in place?
A reference point.
200
What are the two types of friction?
Static friction & kinetic friction.
200
What is the unit used to measure force?
Newton.
200
What is velocity?
Velocity is the speed of an object in a specific direction.
200
Why are mass and weight so commonly confused?
This is because mass has a great affect on weight.
300
Can objects not in motion, be a reference point?
Yes, anything can be a reference point.
300
What causes friction?
The "hills and valleys" of two surfaces rubbing together.
300
What is the difference between balanced and unbalanced forces?
Balanced forces have a net force of 0 newton. Unbalanced forces don't have a a net force of 0 newton.
300
What is the average speed of a person who ran 2 miles in 20 minutes?
2 miles/20 minutes=.1 mile per. minute.
300
How does the mass of an object affect its gravitational force?
The larger the mass of an object is the greater the gravitational force.
400
Which of the following would be a good reference point: a.) The ground b.) A dog c.) A tree d.) All of the above
d.) All of the above
400
How can you increase friction?
You can increase friction by making surfaces rougher, and by increasing the force pushing surfaces together.
400
Explain the meaning of the phrase, "forces act on objects."
The pushing and pulling of forces exerted on an object.
400
What is the equation for average acceleration?
Average acceleration=final velocity- starting velocity/ time it takes to change velocity.
400
A man has a mass of 162 kg. and a weight of 1,588 N. Jupiter is about 2.3 times the gravitational force on Earth. What is the mass of the man on Jupiter?
162 kg. is the mass of the man on Jupiter.
500
What is a form of motion do you experience on a carouse?
Circular Motion.
500
List the materials from most friction to least friction. a.) A smooth table b.) Rug c.) Styrofoam d.) Cloth
1. Cloth 2. Rug 3. Styrofoam 4. A smooth table
500
How do you find net force?
If both forces are going in opposite directions, subtract the smaller force form the larger force. If both forces are going in the same direction, add both forces together.
500
How do you find one's resultant velocity?
If you are combining two velocities going in the same direction, you add them together, If you are combining two velocities going in different directions, you subtract the smaller velocity from the larger one.
500
What is the law of universal gravitation?
All objects in the universe attract to each other through gravitational force.