definitions

Question 1

distance

Answer 1

how far an object has moved (scalar)

Question 2

displacement

Answer 2

the amount by which a thing has moved from it’s original position (vector)

Question 3

equation for average speed

Answer 3

speed = distance
—
time

Question 4

vector

Answer 4

a quantity that has a both a magnitude and a direction

Question 5

scalar

Answer 5

a quantity that only has a magnitude

Question 6

scalars?

Answer 6

distance, mass, speed, energy

Question 7

vectors?

Answer 7

force, displacement, momentum, acceleration, weight, velocity

Question 8

what is the difference between speed and velocity?

Answer 8

speed: scalar, only magnitude (size)
velocity: vector, magnitude(size) + direction

Question 9

centripetal force

Answer 9

a force that acts on a object moving in a circular path and is directed towards the center around which the object is moving

Question 10

newton’s first law

Answer 10

an object does not need a resultant force to keep moving - it only needs a resultant force to speed up, slow down or change direction

Question 11

mass

Answer 11

a quantity of matter in an object

Question 12

weight

Answer 12

the pull force the object experiences depending on the gravitational field strength

Question 13

normal force

Answer 13

an opposing force from the ground acts upwards

Question 14

force

Answer 14

something that acts on an object that can change its shape, direction or speed

Question 15

average walking speed?

Answer 15

1.4 m/s

Question 16

average running speed?

Answer 16

3 m/s

Question 17

average cycling speed?

Answer 17

6 m/s

Question 18

average speed of car in a town?

Answer 18

13 m/s

Question 19

average speed of car on a motorway?

Answer 19

30m/s

Question 20

average rain speed?

Answer 20

50 m/s

Question 21

average aeroplane speed?

Answer 21

250 m/s

Question 22

average wind speed?

Answer 22

3 - 20 m/s

Question 23

average sound speed?

Answer 23

340 m/s

Question 24

average lorry speed?

Answer 24

25 m/s

Question 25

two things used to measure speed in a experiment?

Answer 25

• stopwatch

- light gates

Question 26

equation for acceleration?

Answer 26

a = (v - u)
—
t

Question 27

what does gradient represent on a distance/time graph?

Answer 27

velocity

Question 28

what does horizontal line represent on a distance/time graph?

Answer 28

that the object’s stationary

Question 29

what does curve represent on a distance/time graph?

Answer 29

that the object is accelerating or decelerating

Question 30

what does straight slope represent on a velocity/time graph?

Answer 30

acceleration

Question 31

what does horizontal line represent on a velocity/time graph?

Answer 31

that the object is at a constant velocity

Question 32

what does curve represent on a velocity/time graph?

Answer 32

a changing velocity

Question 33

value of acceleration due to gravity -

Answer 33

10 m/s squared

Question 34

summary of newton’s first law

Answer 34

a moving object will remain at a constant velocity until an external force acts on it
a stationary object will remain stationary until an external force acts on it

Question 35

what will a non-zero resultant force produce?

Answer 35

it will always production acceleration (or deceleration) in the direction of the force

Question 36

the car is changing direction so it is accelerating. why?

Answer 36

acceleration is a vector force, if the direction changes the force changes so it is constantly accelerating