Question

I will make you as brainly​

Answer 1

Answer:

It is easy by formulas like

Explanation:

for 1) you have to put the value of d1,d2,s1 and so in given formula.

you can do all questions by putting value in formula

if u don't know about formulas then u can comment me

Answer 2

1) for calculating this we have a formula 2v1v2/v1+V2

=2(60)(80)/60+80

=68.5

2)a=-2m/s^2

t=10s

u=?

we know a=u/t

-2=u/10

u=-20m/s

3)a=v/t

10sec=10/60hr

a=40/10/60

a=240km/hr

in m/s^2

just multiply a with 5/18

240*5/18=66.6m/s^2

4)

a)a=v/t

=4.5/2=9/4

=2.25

b)=4.5/8=9/16

0.56

c) during the last two seconds body at 2m/s

a=2/2=1

d)we can measure displacement

integration from 0 to 2seconds gives 9m

from 2 to 10 sec gives 1 m

from 10 to 15 sec gives 27.5 m

add all those 37.5m

so s=37.5m

hope this helps u