Physics P1 June

Question 1

vector

Answer 1

a physical quantity with magnitude and direction

Question 2

resultant

Answer 2

a single vector having the same effect as two or more vectors acting together

Question 3

equilibrium

Answer 3

all forces acting on a system produce a zero reultant

Question 4

weight

Answer 4

the gravitational force the earth exerts on an object on or near its surface

Question 5

normal force

Answer 5

the force that a surface exerts on an object with which it is in contact and which is perpendicular to the surface

Question 6

Newton’s first law of motion

Answer 6

a body will remain in its state of rest or continue moving at a constant velocity unless a net force acts on it

Question 7

Newton’s second law of motion

Answer 7

when a net force acts on an object the object will accelerate in the direction of the net force. This acceleration is directly proportional to the force and inversely proportional to the mass of the object

Question 8

Newton’s third law of motion

Answer 8

when object A exerts a force on object B, then object B exerts a force on object A equal in magnitude and opposite in direction

Question 9

newton’s law of universal gravitation

Answer 9

each body in the universe attracts every other body with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres

Question 10

conservation of charge

Answer 10

the net charge of an isolated system remains constant during any physical process

Question 11

electric field

Answer 11

region of space in which an electric charge experiences a force

Question 12

weight

Answer 12

the gravitational force that the earth exerts on an object on or near its surface