Section 3 - Forces Flashcards
1
Q
Newton’s first law
A
If the resultant force on an object is zero then the object will either remain stationary, or if it was already moving then it will continue with uniform motion.
2
Q
Newton’s second law
A
The rate of change of momentum is directly proportional to the applied force and occurs in the same direction as the force.
3
Q
Newton’s third law
A
If body A exerts a force on body B, then body B exerts an equal but opposite force on body A.
4
Q
Free body diagram forces
A
Weight, normal reaction, air resistance, friction, driving force, contact force, attractive gravitational force, tension.
5
Q
In a lift
A
Accel= normal less than weight Decel= normal more than weight
6
Q
Terminal velocity
A
The constant maximum velocity of an object when the resistive forces are equal and opposite to the accelerating force.
