Dynamics

Question 1

How does net force relate to mass and acceleration?

Answer 1

F = m * a

Question 2

What is the equation for friction?

Answer 2

Friction = f / N

Question 3

What is the equation for work done?

Answer 3

Work done, U = Force * distance

Question 4

What is the equation for newtons law of gravity?

Answer 4

F = G *m1 * m2 / r^2

Question 5

What is the equation for volume of sphere?

Answer 5

Volume of sphere = 4/3 * Pi * r^3

Question 6

What is the equation for mass of sphere?

Answer 6

Mass of sphere = Density * Volume

Question 7

What is the gravitation constant G?

Answer 7

6.67*10^-11

Question 8

What equation is used to find the potential energy of a spring?

Answer 8

Ve = 1/2 * k * x^2

Question 9

What is the equation for efficiency?

Answer 9

Efficiency = Power output / power input

Question 10

What is the equation for power?

Answer 10

Power = work done / time

Question 11

Equation for potential gravitational energy?

Answer 11

Vg = m * g * h

Question 12

What is the equation for Kinetic Energy?

Answer 12

T = 1/2 * m * v^2

Question 13

What is the equation for angular velocity?

Answer 13

angular velocity = 2pi /T = 2 * pi * frequency

Question 14

How can stiffness of parallel springs be found?

Answer 14

K total = K1 + K2 + … + Kn

Question 15

How can the stiffness of springs in series be found?

Answer 15

1/K total = 1/K1 + 1/K2 + 1/K3

Question 16

Whats the equation for work done by a gravitational force?

Answer 16

U1-U2= - mgh

Question 17

What is the equation for work done by a spring force?

Answer 17

U = -(1/2kx1^2 - 1/2kx2^2)

Question 18

What equation is used for the principle of energy conservation?

Answer 18

T1 + Vg 1 + Ve 1 + U 1-2 = T2 + Vg2 +Ve 2

Question 19

What are the equations of motion?

Answer 19

V = U + AT
S = UT + 0.5at^2
V^2 = 2as +u^2
s =(v-u)t/2