1. Terminal
Velocity

2. Terminal velocity
In this study of a skydiver you will:-
interpret velocity-time graphs
work out acceleration and deceleration
calculate the distance travelled

3. Velocity(m/s) Time(s) A B 48 C D E 50 Terminal velocity deceleration
acceleration
Constant
slower
speed C D
deceleration E 50
Time(s)

4. Velocity(m/s) Time(s) 4 2 3 48 36 5 1 24 8 7 12 6 9 10 20 30 40 50
1 Where is the skydiver is accelerating
2 Where is the skydiver slowing down (decelerating) and
3 Where does the skydiver reach terminal velocity?
4 Where does the skydiver open her parachute?
5Label the point when the ground is reached
Velocity(m/s) 4 2 3 48 36 5 1 24 8 7 12 6 9
Time(s) 10 20 30 40 50

5. Velocity(m/s) Time(s) 4 2 3 48 36 5 1 24 8 7 12 6 9 10 20 30 40 50
1 Where is the skydiver is accelerating 1
2 Where is the skydiver slowing down (decelerating) and 9
3 Where does the skydiver reach terminal velocity? 2
4 Where does the skydiver open her parachute? 4
5Label the point when the ground is reached 8
Velocity(m/s) 4 2 3 48 36 5 1 24 8 7 12 6 9
Time(s) 10 20 30 40 50

6. 6. Initially the person speeds up from 0 to 48m/s in
5seconds. Work out the acceleration
7. The person then falls at a terminal velocity of
48m/s for 24s. How far has he fallen at this speed?
8. 48m/s to 12m/s in 6s. What deceleration is this?
Acceleration = =
Distance fallen = X =
Deceleration = =

7. 9. 12m/s for 13s. How far has he fallen at this speed?
10. 12m/s to 0m/s in 2s. What deceleration is this?
Distance fallen = X =
Deceleration = =

8. 6. Initially the person speeds up from 0 to 48m/s in
5seconds. Work out the acceleration
7. The person then falls at a terminal velocity of
48m/s for 24s. How far has he fallen at this speed?
8. 48m/s to 12m/s in 6s. What deceleration is this?
9. 12m/s for 13s. How far has he fallen at this speed?
10. 12m/s to 0m/s in 2s. What deceleration is this?
(for extra help use action buttons below)
(48 – 0)/5 = 9.6m/s 2
48 X 24 = 1152m
(12-48)/6 = - 6 m/s 2
12 X 13 = 156 m
(0-12)/2 = - 6 m/s 2

9. Deceleration is when an object down.
Key points to remember
Deceleration is when an object down.
Use the formula for calculating acceleration but
remember that the answer will be for a
decelerating object.
Distance travelled = under the graph
velocity
time
The area under a
-time graph is
the travelled
by the object

10. Deceleration is when an object slows down.
Key points to remember
Deceleration is when an object slows down.
Use the formula for calculating acceleration but
remember that the answer will be negative for a
decelerating object.
Distance travelled = area under the graph
velocity
time
The area under a
velocity-time graph is
the distance travelled
by the object

11. END