dynamics

Question 1

what is newton’s second law of motion?

Answer 1

it states that the rate of change of linear momentum is directly proportional to the resultant force acting on it and is in the direction of resultant force

Question 2

what is newton’s first law of motion?

Answer 2

a body stays at rest or continues to move with a constant speed in a straight line unless acted upon by a net external force

Question 3

what is newton’s third law of motion?

Answer 3

if body a exerts a force on body b, then body b will exert an equal and opposite force on body a

Question 4

what is the principal of conservation of linear momentum?

Answer 4

the total linear momentum of a system remains unchanged if no net external force acts on the system - initial mv = final mv

Question 5

what is an inelastic collision?

Answer 5

some or all kinetic energy is converted into other forms of energy

Question 6

what is an elastic collision?

Answer 6

100% of kinetic energy is conserved - for elastic collisions, relative speed of approach = relative speed of separation // u1-u2 = v2-v1

Question 7

what is impulse?

Answer 7

the product of average force and the time interval over which it is applied (area under the F-t graph)

Question 8

what is the impulse momentum theorem?

Answer 8

it states that the total change in momentum of a particle during a time interval equals the impulse of the net force that acts on the particle during that interval