Motion

Question 1

Is distance a scalar or vector quantity?

Answer 1

Scaler

because it doesn’t involve direction

Question 2

Is displacement a scalar or vector quantity

Answer 2

Vector

because it measures the distance and direction in a straight line from an objects starting point to its finishing point

Question 3

What is the difference between speed and velocity?

Answer 3

Speed is a Scalar (speed is how fast you are with no regard of the direction)
Velocity is a Vector (velocity is a speed given direction)

Question 4

Show a calculation you can use if you want to measure the speed of an object thats moving with a constant speed?

Answer 4

distance travelled (m)= speed(m/s) x time(s)
s = vt
(When there isn't a constant speed the formula gives the average((mean)) during that time)

Question 5

What is the typical speed of a person walking?

Answer 5

1.5 m/s

Question 6

What is the typical speed of a person running?

Answer 6

3 m/s

Question 7

What is the typical speed of a person cycling?

Answer 7

6 m/s

Question 8

What is the typical speed of a car?

Answer 8

25 m/s

Question 9

What is the typical speed of a train?

Answer 9

30 m/s

Question 10

What is the typical speed of a plane?

Answer 10

250 m/s

Question 11

What is the equation you use to find the average acceleration of an object?

Answer 11

Acceleration(m/s²)= final velocity(m/s) - initial velocity(m/s) / time(s)
a= v-u / t
(If deceleration then its a negative number!)

Question 12

What equation do you use to calculate constant (uniform) acceleration?

Answer 12

Final velocity(m/s) - initial velocity(m/s)= 2 x acceleration(m/s²) x distance(m)
v²-u² = 2as

Question 13

What do flat lines show in a distance-time graph?

Answer 13

Where its stationary

Question 14

What do straight uphill sections show on a distance-time graph?

Answer 14

its accelerating at a steady speed

Question 15

what does a steepening curve show on a distance-time graph?

Answer 15

its speeding up

Question 16

what does a levelling off curve mean on a distance-time graph?

Answer 16

Its slowing down

Question 17

what does the gradient equal to on a distance-time graph?

Answer 17

speed=distance/time

change in y axis) / (change in x axis

Question 18

what does the gradient equal in a velocity-time graph?

Answer 18

acceleration= velocity / time

Question 19

what do flat lines equal on a velocity-time graph?

Answer 19

travelling at a constant speed

Question 20

what do straight lines going uphill or downhill mean on a velocity-time graph?

Answer 20

Constant acceleration/ de acceleration

Question 21

What does newtons first law consist?

Answer 21

a resultant force is needed to make something start moving, speed up or slow down
if the resultant force on a stationary object is zero then the object will stay stationary
if the resultant force is moving and the object is zero it’ll carry on moving at the same velocity

Question 22

What is the equation that calculates the resultant force? (Newtons second law)

Answer 22

Resultant force (N) = Mass(kg) x Acceleration(m/s²)
F = ma

Question 23

What does newtons second law consists?

Answer 23

Large forces are needed to produce large accelerations

Question 24

What is the equation you use to calculate momentum?

Answer 24

momentum(kg m/s) = mass(kg) x velocity(m/s)

p= mv