mechanics

Question 1

scalar

Answer 1

scalar quantity has magnitude only no direction

Question 2

vector

Answer 2

vector quantity has both direction and magnitude

Question 3

distance

Answer 3

length from one point to another

Question 4

displacement

Answer 4

distance in a certain direction per unit of time

Question 5

speed

Answer 5

distance travelled per unit of time
rate of change of distance with respect to time

Question 6

velocity

Answer 6

distance travelled per unit time in a particular direction

Question 7

acceleration

Answer 7

rate of change of velocity = change in velocity divided by time = m/s squared

Question 8

mass

Answer 8

the mass of a body is its ability to resist changes in velocity

Question 9

momentum

Answer 9

product of mass and velocity

Question 10

newtons first law of motion

Answer 10

an object will remain at constant velocity unless a force acts upon it

Question 11

newtons second law

Answer 11

when a force acts upon an object the rate of change of momentum is directly proportional to the force acting and takes place in the direction of the force

Question 12

newtons third law

Answer 12

for every action will have an equal but opposite reaction

Question 13

force

Answer 13

a force is something that can cause an object to accelerate

Question 14

weight

Answer 14

the force exerted on a body by the gravity of the earth

Question 15

one newton

Answer 15

the force which gives a mass of 1kg an acceleration of 1 m/s2