Bike

Question 1

Friction

Answer 1

Friction is a force between two surfaces that are sliding, or trying to slide, across each other.

Question 2

Energy

Answer 2

Energy is the ability to do work.

Question 3

Velocity

Answer 3

Velocity is speed in a given direction.

Question 4

distance

Answer 4

the extent or amount of space between two things, points, lines, etc..

Question 5

force

Answer 5

A force is anything which can change the velocity of an object or make it move

Question 6

Mass

Answer 6

Mass is the amount of matter in an object.

Question 7

acceleration

Answer 7

increase in speed or rate.

Question 8

Attract

Answer 8

cause to come to a place or participate in a venture by offering something of interest or advantage

Question 9

Lubricant

Answer 9

a substance used for lubricating an engine or component, such as oil or grease.

Question 10

Gravity

Answer 10

the force that attracts a body towards the centre of the earth, or towards any other physical body having mass.

Question 11

Repel

Answer 11

drive or force (an attack or attacker) back or away.

Question 12

Newton

Answer 12

the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one metre per second per second, and is equivalent to 100,000 dynes

Question 13

North pole

Answer 13

either of the two locations ( North Pole or South Pole ) on the surface of the earth (or of a celestial object) which are the northern and southern ends of the axis of rotation.

Question 14

South Pole

Answer 14

either of the two locations ( North Pole or South Pole ) on the surface of the earth (or of a celestial object) which are the northern and southern ends of the axis of rotation.

Question 15

Reaction time

Answer 15

he time elapsing between the beginning of the application of a stimulus and the beginning of an organism’s reaction to it.

Question 16

Magnetism

Answer 16

a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects

Question 17

Mass

Answer 17

a large body of matter with no definite shape.

Question 18

Distance

Answer 18

the length of the space between two points.

Question 19

Ticker time

Answer 19

The ticker timer makes dots on a paper tape every fiftieth of a second. 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 20

Balanced forces

Answer 20

If two individual forces are of equal magnitude and opposite direction, then the forces are said to be balanced. An object is said to be acted upon by an unbalanced force only when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction

Question 21

Deceleration

Answer 21

deceleration. Deceleration is a slowing down: the unexpected deceleration of your car might mean that you’ve run out of gas. Use the noun deceleration when you talk about a gradual decrease in speed