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The difference between weight an mass is that weight can change and mass can't.

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Gravity has pull on any type of matter it is just that id gravity and matter canges then the wight of an object can change too.

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Gravity a force of attraction

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You can reduce friction by putting oil in a car so the engage parts don't rub up ageist each other.

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Friction can be harmful and helpful. It can be helpful by the road agent the tries if we didn't have that then you wouldn't be able to stop. It can be harmful be if the engage parts of a car were rubbing ageist each other.

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Kentic friction is a typed of friction that is moving friction that moves. Static friction is a type of friction that doesn't move.

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A force that poses motion

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Unbalanced forces means that one force has more strengthener or is bigger than the other.When a force is balanced then that means that the forces are the same so nothing moves .

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Forces can go in all kinds of direction there could be the force in gravity which is all was pushing down.

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You express a force in newtons

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What is a force

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Did you know you could combined velocities by say if you were on the bus and sitting in the back and then you get up and walk up front, you are combining velocities.

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There are two thing that are important to velocity and they are the direction to which the object is moving or the speed changes.

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Speed is measured by dividing the total distance and total time .

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Motion- an objects change in position relative to the reference point

Speed-a moving object that has no direction or the distanced traveled dived by the time interval during which the motion occurred

Velocity-a moving object that has direction

Acceleration- when a moving object starts to speed up.

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Measuring Motion

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Motion
Speed
Velocity
Acceleration
Force
Newton
Net Force
Friction