Kinematics

Question 1

A kinematic equation of an object in motion at a constant acceleration when the final velocity is not known.

Answer 1

Δx = displacement in m

v0 = initial velocity in m/s

Δt = time in motion in s

a = acceleration in m/s2

Question 2

Used to calculate speed, which has no direction and is therefore always positive.

Answer 2

Δx = distance in m

Δt = time elapsed in s

Question 3

A kinematic equation of an object in motion at a constant acceleration when the time in motion is not known.

Answer 3

vf = final velocity in m/s

v0 = initial velocity in m/s

a = acceleration in m/s2

Δx = displacement in m

Question 4

Velocity of x-axis: Used to calculate the horizontal component of the initial velocity for objects in projectile motion:

Answer 4

vx = horizontal component of velocity in m/s

v0 = velocity in m/s

𝜃 = angle of motion relative to horizontal in degrees

Question 5

Used to calculate velocity, which has direction and can therefore be positive or negative.

Answer 5

Δd = displacement in m

Δt = time elapsed in s

Question 6

Velocity of y-axis: Used to calculate the vertical component of the initial velocity for objects in projectile motion

Answer 6

vy = vertical component of velocity in m/s

v0 = velocity in m/s

𝜃 = angle of motion relative to horizontal in degrees

Question 7

A kinematic equation Used in situations of an object in motion at a constant acceleration when the displacement of motion is not known.

Answer 7

vf = final velocity in m/s

v0 = initial velocity in m/s

a = acceleration in m/s2

Δt = time in motion in s

Question 8

Centripetal Force

Answer 8

Fc = centripetal force in N

m = mass in kg

v = velocity in m/s

r = radius of circular path of motion in m

Question 9

Formula for the centripetal acceleration of an object

Answer 9

ac = centripetal acceleration in m/s2

v = velocity in m/s

r = radius of circular path of motion in m

Question 10

Acceleration

Answer 10

Δv = change in velocity in m/s

Δt = time elapsed in s

Question 11

Impulse (J)

Answer 11

Impulse (J) is the product of force and the time duration over which the force acts. It is also equivalent to the change in momentum (Δp) of the object.

J = Impulse (in kg⋅m/s)
F = Force (in N or kg⋅m/s2),
Δt = Time duration (in s),
Δp=m⋅Δv = Change in momentum (in kg⋅m/s.