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Question 1

Circular Motion - Position

Answer 1

s = rθ

Question 2

Circular Motion - Angular Frequency

Answer 2

d(θ) / dt

Question 3

Circular Motion - Velocity

Answer 3

By combining the position and angular frequency formulas,
v = rω

Question 4

Circular Motion - Centripetal Acceleration

Answer 4

By approximating dv between varying velocities (same magnitude) using an arc,
a = v² / r

Question 5

Circular Motion - Centripetal Force

Answer 5

F = m (v² / r)

Question 6

Circular Motion - Period

Answer 6

The time taken for one revolution to occur is given by,
2π / ω

Question 7

Coulomb’s Law

Answer 7

F = kₑ(Q₁Q₂ / r²)

Question 8

kₑ

Answer 8

kₑ = 8.99x10⁹ Nm² C⁻² OR
kₑ = 1 / 4πε₀ where ε₀ = 8.85x10⁻¹² Nm⁻¹

Question 9

Results of coulomb’s law

Answer 9

-F => Attraction
+F => Repulsion

Question 10

Moon

Answer 10

Astronomical body that orbits a planet. Natural satellite.

Question 11

Asteroid

Answer 11

Rocky, metallic or icy body with no atmosphere.

Question 12

Comet

Answer 12

Icy body that releases gases near the sun, producing an atmosphere and a gas tail.

Question 13

Planet

Answer 13

Spheroid body that orbits a star.

Question 14

Star

Answer 14

Spheroid, luminous body of plasma that emits radiation via fusion.

Question 15

Lunar phases

Answer 15

New, first quarter, full, last quarter

Question 16

Newtonian Gravity Equation

Answer 16

F = G ( M₁M₂ / r² )

Question 17

G

Answer 17

G = 6.67 x 10⁻¹¹ Nm² kg⁻²