ECC quiz

What happens when two forces act in the same direction?

• They cancel each other out

• The stronger one prevails

• Their strengths are added

• Their sum divided by two is the total force

The greater the mass of an object

• the easier the object starts moving

• the greater its inertia

• the more balanced it is

• the more space it takes up

Any force that causes an object to move in a circle is called a(n)

• balanced force

• gravitational force

• unbalanced force

• centripetal force

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail

• creates a friction with the hammer

• disappears into the wood

• exerts an equal and opposite force on the hammer

• moves at a constant speed

1.     The Theory of Relativity is the product of which of the following scientists?

• Isaac Newton

• Albert Einstein

• Stephen Hawking

• Marie Curie

Protons carry which of the following types of charge?

• Positive

• Negative

• Variable

• Neutral

Which form of radiation has the longest wavelength?

• Ultraviolet

• Radiowaves

• Infrared

• X-Ray

1.     Sound travels fastest through which of the following?

• Solids

• Liquids

• Air

• Vacuum

How many colours can be found in sunlight?

• 5

• 7

• 6

• 9

In Einstein's famous equation E=mc², what does the "c" stand for?

• mass

• colour

• speed of light

• energy