CMM. SCIENCE PHYSICS. MAY 2025

AT-A-DISTANCE FORCES

100

It is a Force that is exerted mainly because of an object's mass

a) Magnetism

b) Electricity

c) Gravity

c) Gravity

200

It's a type of At-a-distance Force exerted by the action of charged objects

Electric Force (Electricity)

300

Force that works only on certain materials that attract specific metals like Iron.

Magnetism

400

All non contact forces share the following characteristic 

a) The closer the distance between objects is, the stronger they get

b) They are all related to mass

c) They all work due to friction

d) All have attraction and repelence

a) The closer the distance between objects, the stronger they are

GRAVITY

100

It's the main reason that explains why objects like the Earth can exert a highly noticeable Gravitational Pull

The Earth's mass is too big

200

Objects like the Moon or other natural satellites are too small to have Gravity

a) True    b)False

   b)False

300

When any object takes off the planet, the higher the Altitude is, the _______ the gravity will be.

Weaker

400

Calculate the Weight (N) of a Person (85 kg) that stands on the Moon Titan, one of Saturn's moons. It is estimated that Titan's g is 1.325 m/s² 

W= mg

112.63 N

500

Law of Universal Gravitation. Calculate the Gravity Force (F_g) that the Sun Exerts on Mercury. Consider the following data: 

Sun's Mass= 1.989 ×10³⁰ kg 

Mercury's Mass= 3.285 ×10²³ kg 

Distance between them= 47,151,000 km

G = 6.67 x10^-11

Fg= G (m1 x m2 / d²)

1.96 x10²² N

ELECTRIC FORCE

100

Electrical Negative Charges come from very small particles called: 

a) Neutrons

b) Protons

c) Electrons

d) Positrons

c) Electrons

200

Objects have typically a neutral charge, this is due to: 

a) Amount of Neutrons being greater than that of Protons

b) Amount of Protons being greater than that of Electrons

c) Amount of Electrons being the same as that of Protons

c) Amount of Electrons being the same as that of Protons

300

Two charged objects get close enough to interact. Each object has an overall charge of  -30 C. Which is more likely to occur?

a) Both objects will be attracted equally

b) Both objects will be repealed unequally

c) Both objects will be attracted unequally

d) Both objects will be repealed equally

d) Both objects will be repealed equally

400

Calculate the Electric Force (F_E) between two objects with the following charges. 

Object A: -20 C

Object B: +5 C

Distance: 20 cm

k= 9 x10⁹

F_E = k (q1 x q2 / d²)

- 2.3 x10¹³ N

500

Calculate the Electric Force (F_E) between two objects with the following charges. 

Object A: +10 C

Object B: +10 C

Distance: 30 cm

k= 9 x10⁹

F_E = k (q1 x q2 / d²)

1 x10¹³ N

MAGNETIC FORCE/ELECTROMAGENTISM

100

All materials have Magnetic Properties

a) True      b) False

 b) False

200

Pick the choice that correctly depicts a Magnetic Attraction:

a) Positive to Negative

b) South to North

c) North to North

d) South to South

b) South to North

300

The Planet Earth can move a compass needle, therefore: 

a) There are magnets everywhere on Earth

b) The compass gets attracted by Earth's gravity

c) The Earth is a Magnet

c) The Earth is a Magnet

400

Electromagnetism was first described by: 

a) Isaac Newton

b) Michael Faraday

c) Nikola Tesla

d) Elon Musk

b) Michael Faraday