Calculating Net Force
Part 1: For objects that are moving
Directions:
1. Assume that the object is moving towards the right
2. Calculate the net Force (Show ALL of your work)
Net Force = (All the same direction forces added up) – (All the opposite direction forces added up)
3. State if the object is speeding up, slowing down, or moving at a constant speed.
4. State if the forces are balanced or unbalanced
1.
Net Force = (66N) - (66N+66N) = 66N Backwards
The Object will slow down.
The forces are unbalanced.
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2.
Net Force = (124N) - (32N) = 92N Forwards
The object will speed up.
The forces are unbalanced.
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3.
Net Force = (33N=55N=20N) - (77N=31N) = 0N
The object is not moving.
The forces are balanced.
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4.
Net Force = (124N - 41N) - (52N) = 31N Forwards
The object is speeding up.
The forces are unbalanced.
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Part 2: For objects that are stationary
1. Assume that the object is not moving
2. Calculate the net Force (Show ALL of your work)
Net Force = (All the same direction forces added up) – (All the opposite direction forces added up)
3. State if the object will move left, right, up, down, or combination of some of those
4. State if the forces are balanced or unbalanced
5.
Left Right Net Force = (88N) - (88N) = 0N
Up Down Ne t Force = (134N) - (53N) = 81N Down
The object will move down.
The forces are unbalanced.
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6.
Left Right Net Force = (88N) - (178N) = 90N Left
Up Down Net Force = (75N) - (90N) = 15N down
The object will move left down.
The forces are unbalanced.
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7.
Left Right Net Force = (88N) - (44N + 44N) = 0N
Up Down Net Force = (15N + 77N) - (110N) = 18N down
The object will move down.
The forces are unbalanced.
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Summary:
Partner 1 Summary
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Calculating Net Force:
Add up all the Net Forces on the left side, then subtract, that from the total of added up Net Forces on the right side. If the answer turns out negative, then you'd make the number positive and say the object is moving backwards. If there are multiple Net Forces acting upon the object then you would do the same thing as before, except you;d also calculate the Net Forces up and down.
Calculating Multiple Net Forces: Add up all the Net Forces on the left side, then subtract, that from the total of added up Net Forces on the right side. If the answer turns out negative, then you'd make the number positive and say the object is moving backwards. Then you'd add up all the net forces on the top side (push down) and subtract that from the total of added up net forces on the upwards side (pushing up).
Note: *If the forces are equal then the object is not moving
* If the object is not moving then you wouldn't say backwards you'd say left (or instead of forwards say right)
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