Mechanics

Question 1

sinθ =

Answer 1

opposite / hypotenuse

Question 2

cosθ =

Answer 2

adjacent / hypotenuse

Question 3

tanθ =

Answer 3

opposite / adjacent

Question 4

τ = (moments)

Answer 4

Fd

Question 5

Σ clockwise moments =

Answer 5

Σ anticlockwise moments

Question 6

SUVAT without t

Answer 6

v^2 = u^2 + 2as

Question 7

SUVAT without s

Answer 7

a = (v-u) / t

Question 8

SUVAT without v

Answer 8

s = ut + 1/2 at^2

Question 9

SUVAT without u

Answer 9

s = vt - 1/2 at^2

Question 10

SUVAT without a

Answer 10

s = t (v+u) / 2

Question 11

range of projectile

Answer 11

horizontal distance travelled

Question 12

NI states

Answer 12

a body will REMAIN at REST or at a CONSTANT VELOCITY unless acted on by a RESULTANT force

Question 13

NII states

Answer 13

the RESULTANT FORCE of an object is equal to its RATE OF CHANGE IN MOMENTUM where force and momentum are in the SAME DIRECTION

Question 14

Special case of NII

Answer 14

f = ma where mass is constant and f and a are in the same direction

Question 15

NIII states

Answer 15

If body A exerts a force on body B, then body B will exert an force on body A of EQUAL MAGNITUDE.but in the OPPOSITE direction

Question 16

ρ = (momentum)

Answer 16

mv

Question 17

F = (momentum)

Answer 17

Δρ/ Δt

Question 18

KE =

Answer 18

1/2 mv^2

Question 19

GPE =

Answer 19

mgh