1 Runner A finishes a race in less time than runner B. Who is faster?
2 What two measurements are needed to calculate a speed?
distance and time
3 What is the SI unit for speed?
4 What does acceleration mean?
speeding up or slowing down
5 What is a force?
push or pull
6 How do we represent forces on diagrams?
arrows, with length depending on size of force
7 What does mass mean?
amount of substance
8 What is the unit for mass?
9 What does a vector have that a scalar does not?
10 Name a scalar and a vector measured in metres.
11 Name a scalar and a vector measured in metres/second.
12 Name a vector with units of newtons.
force or weight
13 Is mass a vector or scalar?
14 Is energy a vector or scalar?
15 What is acceleration?
a change in velocity
16 Why is acceleration a vector?
it is measuring a change in another vector
17 What is the difference between speed and velocity?
velocity has a direction/is a vector
18 What is the equation for calculating speed?
speed = distance / time
19 What is the SI unit for speed?
metres per second
20 What is average speed?
total distance / time for whole journey
21 What is the equation for calculating distance?
distance = speed x time
22 How is a constant speed shown on a distance/time graph?
straight, sloping line
23 What does a horizontal line on a distance/time graph show?
24 What is the speed of sound in air?
25 How is a stationary object shown on a distance/time graph?
26 How can you tell which part of a journey shown on a distance/time graph has the highest speed?
27 How can you calculate velocity from a distance/time graph?
gradient of line
28 What does acceleration mean?
change in velocity in time
29 What are the units for acceleration?
metres per second squared
30 In the acceleration equation, what does u stand for?