Science Quiz - Forces

A force is a:

• push

• pull

• twist

• none of the preceding

Rewrite the following sentence, but fill in the blanks: A force can change the _____, _____ or _________ of an object.

Answer explanation

A force can change the shape, speed (slow it down or speed it up) or direction of an object.

What are the different types of forces (e.g. gravity)?

Answer explanation

The different types of forces are: Friction, applied force (push/pull), air resistance, buoyancy, gravity (weight force), reaction force, magnetic force, electrostatic force (uses static electricity).

Forces can be measured by using a ______ _______.

(a)  

Forces are measured in a unit called (a)   .

To convert kilograms to newtons (the reading may be in the unit kg on a spring balance), you have to:

• Multiply by 1 (1kg = 1N)

• Multiply by 5

  (1kg = 5N)

• Multiply by 10 (1kg = 10N)

• Multiply by 15

  (1kg = 15N)

• Multiply by 20

  (1kg = 20N)

What are the two types of forces?

Answer explanation

The two types of forces are contact forces and non-contact forces.

Rewrite the following sentence and finish it with an accurate description: A contact force is when…

Answer explanation

A contact force is when the two interacting objects are physically touching (there is physical contact).

Rewrite the following sentence and finish it with an accurate description: A non-contact force is when…

Answer explanation

A non-contact force is when the two interacting objects are not touching (there is no physical contact).

A normal force (reaction force) is a:

• non-contact force

• contact force