F4C2: Forces & Motion

Question 1

acceleration

Answer 1

rate of change of velocity

Question 2

displacement

Answer 2

distance between 2 points in a specified direction

Question 3

distance

Answer 3

total path travelled by an object from 1 point to another

Question 4

free fall

Answer 4

an object falling under the gravitational force only

Question 5

friction

Answer 5

a force opposing motion when in contact with surface

Question 6

force

Answer 6

rate of change of momentum acting on an object in the direction of change of momentum of the object

Question 7

impulse

Answer 7

change of momentum

Question 8

impulsive force

Answer 8

the rate of change of momentum in a short time interval during collision

Question 9

inertia

Answer 9

tendency of an object to resist changes to its state of motion

Question 10

mass

Answer 10

quantity of matter in an object

Question 11

momentum

Answer 11

product of the mass and the velocity of a moving object

Question 12

power

Answer 12

rate of work done / rate of energy transformed

Question 13

speed

Answer 13

rate of change of distance

Question 14

velocity

Answer 14

rate of change of displacement

Question 15

weight

Answer 15

gravitational force acting on the object

Question 16

conservation of momentum

Answer 16

total momentum in a closed system is constant

Question 17

newton’s first law

Answer 17

in the absence of external forces, an object at rest remains at rest and an object in motion continues in motion with a constant velocity in a straight line

Question 18

newton’s third law

Answer 18

for every force, there is a reaction force with the same magnitude but in the opposite direction