The forces f 1, f 2, f n acting at the same point p are said to be in equilibrium if the resultant force is zero, that is, if f 1 + f 2 + + f n = 0.
f 1 = i + j, f 2 = i – j, f 3 = 9 i + 2 j
find the additional force required for the forces to be in equilibrium p.

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?