kinematics/dynamics

Question 1

uniform accelerated motion

Answer 1

v= v0 +at
x(t) = x0 +v0t + 1/2at^2

Question 2

uniform rectilinear motion

Answer 2

x(t) = x0 +vt

Question 3

free fall

Answer 3

y(t) = y0 +v0t - 1/2 9.8 t^2

Question 4

angular velocity

Answer 4

ω=2π/T

Question 5

uniform circular motion acceleration

Answer 5

a = ω^2r

Question 6

uniform circular motion velocity

Answer 6

v= ωr

Question 7

second Newton’s law

Answer 7

f=ma

Question 8

units of second Newton’s law

Answer 8

1N = kg m/s^2

Question 9

weight

Answer 9

weight =mg

Question 10

what is Newton’s first law?

Answer 10

if the sum of the forces is equal to zero then acceleration is equal to zero

Question 11

what is the value of g?

Answer 11

9.8m/s2

Question 12

normal force N

Answer 12

always perpendicular to the surface

Question 13

kinetic energy

Answer 13

KE= 1/2mv^2

Question 14

potential energy

Answer 14

PE=mgh

Question 15

what is the law of conservation of energy?

Answer 15

Etot = 1/2mv^2 +mgh

Question 16

what is the normal force equal to on a slope?

Answer 16

N= mgcosθ

Question 17

what is the acceleration of an object on a slope?

Answer 17

Acceleration= mgsinθ

Question 18

what is force?

Answer 18

a result of the interaction with the environment