Forces I

Question 1

force

Answer 1

Push or pull that acts on objects

Question 2

non-contact forces

Answer 2

Force that acts without being in contact with something

Question 3

contact force

Answer 3

Force that acts when an object is in contact with a surface, air, or water

Question 4

electrostatic force

Answer 4

The force between two charged objects.

Question 5

magnetic forces

Answer 5

Force between the poles of two magnets, or between a magnet and magnetic material

Question 6

attract

Answer 6

Pull together.

Question 7

repel

Answer 7

To push away

Question 8

weight

Answer 8

Force of a planet on an object due to its mass

Question 9

friction

Answer 9

Force that resists motion because of contact between surfaces

Question 10

air resistance

Answer 10

Force on an object that is moving through air, slowing it down (aka. drag).

Question 11

water resistance

Answer 11

Force on an object that is moving through water, slowing it down (aka. drag).

Question 12

thrust

Answer 12

The force from an engine or rocket.

Question 13

upthrust

Answer 13

Force on an object in a liquid or gas that pushes it up

Question 14

floating

Answer 14

When the upthrust from the water is equal to the force of the object’s weight

Question 15

tension

Answer 15

A stretching force

Question 16

reaction

Answer 16

The force from a solid object that pushes at 90° to the surface

Question 17

normal

Answer 17

An imaginary line at right angles to a surface where a light ray strikes it.

Question 18

newton

Answer 18

The unit of force including weight, symbol N.

Question 19

newtonmetre

Answer 19

Unit of moment, symbol Nm.

Question 20

mass

Answer 20

Amount of matter in an object

Question 21

matter

Answer 21

Materials and objects which can be solid, liquid, or gas

Question 22

kilograms

Answer 22

1000 grams.

Question 23

gravitational field

Answer 23

A region in which there is a force on a mass due to its attraction to another mass.

Question 24

gravitational field strength

Answer 24

The force on a mass of 1kg (measured in N/kg).

Question 25

streamlining

Answer 25

Designing the shape of an object to reduce resistance to motion from air or liquid

Question 26

vacuum

Answer 26

A space that has no particles, and so no matter.

Question 27

tangent

Answer 27

A straight line that touches a curve or a circle.

Question 28

orbit

Answer 28

Path taken by one body in space around another

Question 29

satellite

Answer 29

Any body that orbits another (such as moons or weather satellites)

Question 30

newtonmeter/forcemeter/spring balance

Answer 30

A meter that is used to measure the magnitude of a force; also called a forcemeter or spring balance

Question 31

gram

Answer 31

Unit of mass, symbol g.