Forces

Question 1

Newton first law

Answer 1

object remain at or move at straight line until resultant force is applied

Question 2

Newton second law

Answer 2

force is change in momentum per unit time

Question 3

Newton third law

Answer 3

when object A exert force on object B then object B exert equal and opposite force

Question 4

terminal velocity

Answer 4

when object gain speed it gain air resistance and reduce it resultant force until air resistance is equal to the weight which result in 0 resultant force

Question 5

resultant force

Answer 5

mass x acceleration

Question 6

spring constant

Answer 6

force per unit extension(f\x)

Question 7

force change?

Answer 7

speed size direction and shape

Question 8

moment of force

Answer 8

force x perpendicular distance

Question 9

principle of turning effect

Answer 9

total clockwise = anticlockwise(f1d1=f2d2)

Question 10

Centre of gravity

Answer 10

a point which weight are distributed equally to all direction

Question 11

momentum

Answer 11

mass x velocity

Question 12

impulse

Answer 12

force x time

Question 13

hookes law

Answer 13

string expansion is directly proportional to force applied

Question 14

momentum principle

Answer 14

all momentum is constant until external force is being applied

Question 15

resultant force(momentum)

Answer 15

change in momentum/time

Question 16

pressure

Answer 16

force per unit area

Question 17

how to determine atmospheric pressure

Answer 17

the height of liquid in liquid barometer

Question 18

pressure in liquid

Answer 18

change with depth and density change

Question 19

change in pressure

Answer 19

density x gravity x change in height

Question 20

kinetic energy

Answer 20

1\2xMx V square

Question 21

Change in gravitational potential energy

Answer 21

M x G x change in height

Question 21

Change in gravitational potential energy

Answer 21

M x G x change in height