Question

please tell
A cyclist is travelling at 15 m sl. She applies brakes so that she does not collide with a wall 18 m away,
What deceleration must she have ?
1. Draw a velocity-time graph to show the following motion :
A car accelerates uniformly from rest for 5 s; then it travels at a steady velocity for 5 s.
2 The velocity-time graph for part of a train journey is a horizontal straight line. What does this tell you about
(a) the train's velocity, and (b) about its acceleration ?​

sorry it's of science I accidently clicked maths

Answer 1

Answer:

6.25m/s

2

Step-by-step explanation:

Initial velocity, u=15m/s

Final velocity, v=0m/s

Distance, s=18m

Acceleration, a=?

Using relation, v

2

−u

2

=2as

0

2

−(15)

2

=2a×18

−225=36a

a=

36

−225

=−6.25m/s

2

So, deceleration is 6.25m/s

2

.

Answer 2

Answer:

please

Step-by-step explanation:

Ans another question

I will mark u brainlliest