NAME
1
Class
The diagram below is a speed-time graph for the first k seconds
of the motion of an object.
Speed m/s
30
0
20
Time in seconds
k
(a) Find the acceleration when t = 10s.
(b) Find the distance traveled in the first 20 seconds.
(c) The distance traveled in the first k seconds is 720m. Find the
value of k.
Answer
(a)
(b)
(c)
3
The diagram shows the speedtime graph for 70 seconds of a
car’s journey. After 20 seconds
the car reaches a speed of
v m/s. during the 70 seconds
the car travels 1375 m.
(a) Calculate v.
(b) Calculate the acceleration
of the car during the first
20 seconds.
(c) Calculate the distance travelled in the last 10 seconds.
Answer
(a)
(b)
(c)
3
The diagram above is the speed-time graph of a journey.
(a) Calculate the
(i) acceleration during the first 20 seconds,
(ii) the value of k.
(b) During the last part of the journey, the retardation is 3m/s2.
Calculate the time taken while slowing down.
Answer
(a) (i)
(ii)
(b)
4
The diagram is the speedtime graph for the first k
seconds of the motion of
an object.
(a) Find the acceleration
when t = 10 seconds.
speed (metres/second)
(b) Find the distance
travelled in the first
20 seconds.
(c) The distance travelled in the first k seconds is 720 m.
Find the value of k.
Answer
(a)
(b)
(c)