Physics Paper 1

Question 1

Scaler

Answer 1

Physical quantities consisting of magnitude only.

Question 2

Vector

Answer 2

Physical quantities possessing magnitude and directions.

Question 3

Resultant Vector

Answer 3

The single vector which has the same effect as the original vectors combined.

Question 4

Collinear vector

Answer 4

Two or more vectors operating in one and the same dimension

Question 5

Equilibrium

Answer 5

When the resultant of two or more forces exerted on a point are zero, the forces are in equilibrium .

Question 6

Equilibrant

Answer 6

The single force which keeps the other forces in equilibrium

Question 7

The triangle rule of three forces in equilibrium

Answer 7

When the forces exerted on an object are in equilibrium, their in magnitude and direction can be represented sequentially by the sides of a triangle.

Question 8

Net force

Answer 8

The vector sum of all the forces acting on an object

Question 9

Inertia

Answer 9

The resistance of an object to any change in its state of motion.

Question 10

Newtons second law of motion

Answer 10

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

Question 11

Newtons third law of motion

Answer 11

When object A exerts a force on object B , object B simultaneousely exerts an oppositely directed force of equal magnitude on object A.

Question 12

Newtons Law of gravity

Answer 12

Every object in the universe exerts a gravitational attraction force on all other particles. This attraction force is directly proportional to the product of their mass and is inversely proportional to the square of the distance between their centres.

Question 13

weight

Answer 13

the gravitational attraction force that the earth exerts on an object on or close to its surface.

Question 14

Frictional force

Answer 14

The force that opposes the motion of an object and acts parallel to the surface that the object is in contact with .

Question 15

static friction

Answer 15

The frictional force exerted by one surface on another when there is no motion.

Question 16

Maximum static friction

Answer 16

The static friction before an object moves.

Question 17

Kinetic friction

Answer 17

The frictional force a surface exerts on an object when the object is moving across the surface

Question 18

Newton’s First Law of Motion

Answer 18

A body will remain in its state of rest or motion at constant velocity unless a non-zero resultant/netforce acts on it.