Formulas

Question 1

Give the formula for velocity.

Answer 1

• Velocity = displacement/time taken

m. s-1

Question 2

Give the formula for average acceleration.

Answer 2

=change in velocity/time taken

m.s-2

Question 3

Rearrange the equation “a=(v-u)/t”.

Answer 3

at=v-u

Therefore: v=u+at

Question 4

What’s the formula for step frequency?

Answer 4

=rate of stepping/number of steps /s

Question 5

What is the equation for step velocity?

Answer 5

=step length x step frequency

Question 6

Give the formula for angular distance.

Answer 6

Angular distance = sum of angles through which an object moves in passage from the initial and final position
(Scalar)

Question 7

Give the formula for angular displacement.

Answer 7

Angular displacement = the magnitude of the difference between the initial and final positions of a rotating object.
(Vector)

Question 8

Give the formula for angular speed (w).

Answer 8

=change in angular distance/time taken

Rad.s-1

Question 9

Give the formula for angular velocity(w).

Answer 9

=change in angular displacement/time taken

Question 10

Give the formula for angular acceleration (a).

Answer 10

=change in angular velocity/time taken

Question 11

Give the formula for tangential velocity(vt).

Answer 11

=angular velocity(w) x radius of rotation (r)

Question 12

Give the formula for arc length (s).

Answer 12

=angular displacement x radius of rotation

Question 13

Give the formula for weight (W).

Answer 13

=mass x gravity

Question 14

Give the formula for linear momentum.

Answer 14

=mass x linear velocity

Question 15

Give the formula for impulse.

Answer 15

=force x time

Question 16

Give the equation for force (N).

Answer 16

=mass x acceleration

Question 17

Give the equation for work(J).

Answer 17

=force x distance

=F x d

Question 18

Give the equation for power (W).

Answer 18

=work/time
=force x velocity
=W / t

Question 19

Give the formula for speed.

Answer 19

• speed = distance covered/time talent
• s=d/t
  (m. s-1)

Question 20

Give the equation for RFD(N/s).

Answer 20

=peak force / time

=Fp/t

Question 21

Give the equation for jump height.

Answer 21

=1/2gt2

=0.5 x gravity x half flight time squared

Question 22

Give the formula for kinetic energy (J).

Answer 22

KE = 1/2 x mass x velocity squared 
KE = 1/2mv2

Question 23

Give the formula for gravitational potential energy (J).

Answer 23

=mass x acceleration due to gravity x height

=mgh

Question 24

Give the formula for strain energy.

Answer 24

=1/2 x prop constant x deformation

=1/2k deltax

Question 25

Give the formula for total energy (J).

Answer 25

TE=KE+PE

Question 26

Give the formula for linear momentum (kg.m/s).

Answer 26

=mass x linear velocity

=mv

Question 27

Give the equation for the impulse - momentum relationship.

Answer 27

Force x (change in) time = change in (mass x velocity) 
Impulse = change in momentum

Question 28

Give the formula for torque (T).

Answer 28

=eccentric force x distance of moment (torque) arm

=F x d

Question 29

Give the equation for net moments.

Answer 29

=F1 x d1 - F2 x d2

Question 30

Give the formula for moment of inertia (kg.m2).

Answer 30

=m x r2