My Bike

Question 1

Acceleration

Answer 1

change in velocity-(speed in a given direction) / time

Question 2

Attract

Answer 2

to cause to draw near or adhere by physical force

Question 3

Balanced Forces

Answer 3

when two forces acting on an object are equal in size but act in opposite directions

Question 4

Deceleration

Answer 4

term used for acceleration that causes an object to slow down

Question 5

Distance

Answer 5

the extent of space between two objects or places

Question 6

Energy

Answer 6

the capacity for work

Question 7

Electrostatic Force

Answer 7

the forces between particles that are caused by their electric charges

Question 8

Force

Answer 8

forces are pushes or pulls. They are measured in Newtons

Question 9

Force Diagram

Answer 9

simply a diagram showing all the forces acting on an object, the force’s direction and its magnitude.

Question 10

Force Field

Answer 10

an invisible barrier of force

Question 11

Friction Force

Answer 11

force that acts in the opposite direction to the way an object wants to slide, which creates friction.

Question 12

Gradient

Answer 12

an increase or decrease in the magnitude of a property (e.g. temperature, pressure, or concentration) observed in passing from one point or moment to another

Question 13

Gravity

Answer 13

force that makes things fall to the ground on Earth and other planets

Question 14

Lubricant

Answer 14

to apply some oily or greasy substance to (a machine, parts of a mechanism, etc.) in order to diminish friction; oil or grease (something).

Question 15

Magnetism

Answer 15

objects that produce fields that attract or repel other objects

Question 16

Mass

Answer 16

a collection of incoherent particles, parts, or objects regarded as forming one body:
e.g- a mass of sand

Question 17

Newton

Answer 17

the standard unit of force in the International System of Units (SI), equal to the force that produces an acceleration of one meter per second per second on a mass of one kilogram

                                  OR

if no force acts on a body then a body
in motion will continue at a constant speed in a straight
line

Question 18

North Pole

Answer 18

the point at which the extended axis of the earth cuts the northern half of the celestial sphere, about 1° from the North Star; the north celestial pole

Question 19

Reaction Time

Answer 19

reaction time is the amount of time it takes to respond to a stimulus
e.g- of reaction time is when a bug stings within 1 second of being approached

Question 20

Repel

Answer 20

if two things repel each other, they push each other away with an electrical force

Question 21

S.I Units

Answer 21

The SI base units and their physical quantities are:

• meter for length.
• kilogram for mass.
• second for time.
• ampere for electric current.
• kelvin for temperature.
• candela for luminous intensity.
• mole for the amount of substance

Question 22

South Pole

Answer 22

the point at which the axis of the earth extended cuts the southern half of the celestial sphere; the south celestial pole

Question 23

Speed

Answer 23

distance / time

Question 24

Ticker Timer

Answer 24

the ticker timer makes dots on a paper tape every fiftieth of a second.
e.g- so if a piece of tape is pulled through the timer for a second there will be 50 dots on it. Since the spaces between the dots take such a short time (1/50 s) the ticker timer is a very useful instrument for measuring short intervals of time

Question 25

Time

Answer 25

defined as the duration in which all things happen, or a precise instant that something happens

Question 26

Unbalanced Force

Answer 26

unbalanced forces change the way something is moving

Question 27

Velocity

Answer 27

speed in a given direction