Q. 01. A ball hits a wall horizontally at 6m/s. It rebounds horizontally at 4.4m/s. The ball is in contact with the wall for 0.04s. What is the acceleration of the ball?
Solution: Initial velocity(u) = 6.0m/s Final velocity(v) = -4.4 m/s (because direction of ball has become opposite) time = 0.04 s thus, acceleration (a) = (v-u)/t a= [-4.4 – 6.0]/ 0.04 a= (-10.4)/0.04 after multiplying -10.4/0.04 by 100/100 (to make calculations simpler), we get a= -1040/4 = -260 m/s2 Q.02. A cheetah is the fastest land animal and it can achieve a peak velocity of 100 km per hour up to distances less than 500 metres. If the cheetah spots his prey at a distance of 100 meters what is the minimum time it will take to get its prey? Solution: If the cheetah spots the prey at its top speed, the cheetah will hunt down the prey with the speed of 100 km/h. = 27.7 m/s Now, time = d/s = 100/27.7 = 3.6 sec. So, the minimum time the cheetah will take to get the prey is 3.6 s. Q.03. A police jeep is chasing velocity of 45 km/h. A thief in another jeep moving with a velocity of 153 km/h. police fires a bullet with muzzle velocity of 180 m/s the velocity it will strike the car of the thief is? Solution: Given: Velocity of police jeep = 45 m/hr = 12.5 m/s Velocity of thief’s jeep = 153 km/hr = 42.5 m/s Velocity of bullet = 180 m/s Now, since bullet is fired from police jeep which is going at 42.5 m/s, Therefore, velocity of bullet is (180 + 12.5) = 192. 5 m/s. To calculate velocity with which bullet with hit the thief we use concept of relative velocity. Therefore, we have VBT = VB - VT Here VB is velocity of bullet and VT is velocity of thief VBT = 192. 5m/s - 42.5 m/s = 150m/s Q. 05. A car is travelling at 20 m/s along a road. A child runs out into the road 50 m ahead and the car driver steps on the brake pedal. What must the car’s deceleration be if the car is to stop just before it reaches the child? Solution: u = 20m/s ; s = 50m and v = 0m/s Using, V^2 = u^2 + 2as a = (v^2 – u^2)/2s a = (0^2 - 20^2)/(2 x 50) = - 4m/s^2 Acceleration = -4 m/s2 or, retardation = 4 m/s2 Full paper Download More related material VISIT: Motion and Rest
161 Comments
heybabe
3/9/2017 07:34:57 pm
agree
Ashesh
10/10/2017 01:30:22 pm
Not good
Rana
20/8/2021 05:17:12 pm
Hi
Don
24/8/2021 02:25:14 pm
Hi baby
tannu
30/5/2017 09:58:03 am
this is so helpful but so less questions r there
Reply
Saurabh
17/6/2018 10:08:09 am
I love you verry much baby
Lipi
12/7/2019 08:35:54 pm
Yes they are senseless questions. Very few only !
Anushka Rani
28/7/2021 05:54:23 pm
Questions are less but helpful 2/10/2020 10:21:04 am
wshdh238r3kltfn4p[thy4oithfvveilrtgrgkjrbrgibj4toegu4pyhoivj;gtep2oerwgbojrvebtbnkrbbgfkfbrbgfrvfudf iegu8erfer8igedfig98tegrg8yfk bjfi87g4grlgibui87grtbjrgpg[tonj dpkib r98gtr8r5490tieujh 8ugvb
Reply
hxk.XV
4/10/2020 11:58:10 pm
nice but ver hard for my standers
HAFIZ Niyamatullah
1/1/2021 09:46:26 pm
Nice but very hard for my standard
Kushagra
9/7/2016 09:14:58 pm
Are you the Preeti I am thinking of?
Reply
anonymus
11/9/2016 06:03:47 pm
If u really want that preethi or whatever why dont u just go find her fb account to chat with her...Stop filling any space that comes on your way..
SDAFSAFASF
23/5/2017 10:37:25 am
BHAG
Mahima
3/7/2017 08:11:32 pm
Exa2
sailesh
20/9/2017 08:15:43 pm
Good but not ausum
*******
6/6/2018 01:52:52 pm
What is preeti ?
preeti
27/4/2020 01:56:28 pm
yes I am what the fuck is your problem
MR. BIG PENIS
10/7/2020 08:58:57 pm
PREETI MAY I GET YOUR NUMBER OR EMAIL I WANT TO TALK YOU BECAUSE I FUCK GIRLS BY GIVING THEM MONEY AND I WANT TO FUCK YOU BABY I HAVE 9 INCH LONG AND 2.5 INCH WIDE PENIS IT WILL GIVE YOU A LOT OF FUN JUST THINK ABOUT IT
Faroff
27/4/2021 02:15:23 pm
Go and ask kanir singh
Even m sangma
13/8/2016 09:07:14 am
What is motion?
Reply
Anshu
26/8/2017 08:17:07 pm
motion is a change of position of an object over time.
Radhika Gupta
29/1/2018 03:04:19 pm
if a body changes its position with respect to its surroundings, it is said to be in motion. hence, motion is a state by virtue of which a body changes its position with respect to its surroundings.
ketan
8/6/2018 01:12:27 pm
movement of any object is called motion
Shiva
9/9/2020 09:49:28 am
Motion is a change in position of a object about a reference point with respect to time
Simran
11/6/2022 12:31:08 pm
When a body is moving from one place to another so we can said that it is in motion and we can also say that the movement of qn object is called motion
Lipi
10/7/2019 08:42:02 pm
I don't think so
Reply
ajay
14/9/2015 08:15:58 pm
i love you preeti
Reply
unni
16/5/2016 01:44:53 pm
ha ha
sheetal meena
10/9/2016 01:50:24 pm
but preeti not love u
NAMRATA MUNJAL
29/4/2017 05:59:10 pm
Dude this educational website is not meant for this rubbish...😑🙄😥🤔🤐😫😣😒😔😕😖🙁😞😟😢
Jajlen vigal
30/5/2017 07:36:01 pm
Please tell do you love me
Chumakshi Mahanta
3/6/2017 09:11:18 pm
What the heck do u want?? Education or ur stupid nd nonsense PREETI ???😠😠😠😠
preeti
27/4/2020 01:57:49 pm
may I know who r u
Saurabh
17/6/2018 10:09:23 am
I love you very much baby
Reply
Dimplea
21/7/2019 08:16:55 pm
Stupid ute going through love in this site
preeti
27/4/2020 01:59:02 pm
who are u man
not needed
12/5/2020 04:23:34 pm
don't guys feel shame
12345
7/7/2021 02:53:53 pm
This is a studying platform so please don't put such useless and time wasting stuff
Kriti
18/7/2021 02:08:15 pm
Abe saale teri fati choot ,bahan ke lode padhai me dhyaan de nhi toh fail ho jaayega..
Majida
17/8/2015 04:23:01 am
Reply
tom
27/8/2015 09:21:21 am
not enough we need tuter
Reply
harry
8/9/2015 04:13:23 pm
need to improve
Reply
Nupur
13/9/2017 07:48:17 pm
Yes
Reply
tiny
16/9/2015 10:45:14 am
I like these numericals.....
Reply
annu
17/6/2017 04:55:11 pm
these questions are very useful.few more questions should be added.
Reply
tiny
16/9/2015 07:33:38 pm
though there are loads of mistakes
Reply
warsha
18/9/2015 08:45:45 pm
Reply
veronica
22/2/2016 04:41:56 pm
very bad it is not sufficient . could solve in 2 min.
Reply
Ashish
30/11/2016 07:47:19 pm
Aap kahi pagal to nahi na😒
Reply
Nupur
13/9/2017 07:49:32 pm
Some more questions should be added
khushi
30/4/2016 08:33:27 pm
Good but not enough
Reply
Aadarsh
18/4/2020 10:19:34 am
Ya same
Reply
suchivas nanda
11/5/2016 01:55:21 pm
there are many mistakes
Reply
saijal
13/5/2016 10:19:24 am
what nonsense
Reply
Saurabh
17/6/2018 10:10:21 am
Did you like blow job baby
Reply
mamta
13/5/2016 02:02:01 pm
question not sufficient
Reply
sheetal meena
10/9/2016 01:47:53 pm
tera sir
Reply
Gulshan
21/5/2016 10:14:47 am
good
Reply
id
27/5/2016 08:08:20 pm
good
Reply
JASMIN
28/5/2016 11:14:11 am
This was not useful to me .
Reply
sheetal meena
10/9/2016 01:48:25 pm
for me also
Reply
Isha
11/6/2016 11:17:02 am
Good but I want more numericals
Reply
Harjot
14/6/2016 11:32:59 am
Its really awesome numericals. I like all numricals
Reply
ass
14/6/2016 05:58:25 pm
gand me danda
Reply
titan
18/6/2016 12:00:57 pm
not good
Reply
Kriti
18/7/2021 02:11:35 pm
Abe saale
Reply
Deepti
24/6/2016 12:54:57 pm
Not too good we want more
Reply
Annonymous
27/6/2016 01:33:17 pm
if u don't know how to write in English then don't post questions in wrong English please
Reply
Kushagra
9/7/2016 09:14:04 pm
Less answers and answers not explained. Really bad website.
Reply
aaa
15/7/2016 10:48:43 am
Reply
guru
18/7/2016 07:17:11 pm
nice but not satisfied
Reply
rocky
21/7/2016 10:27:32 am
helpful for students with the view of exam
Reply
*
27/8/2016 05:20:50 pm
It was not at all helpful
Reply
47588816
30/8/2016 07:56:29 pm
nice
Reply
sheetal meena
10/9/2016 01:49:22 pm
not so good ok ok type your answers are
Reply
susmita
13/9/2016 11:47:26 am
lot of errors
Reply
susmita
13/9/2016 11:45:37 am
ok ok not so gud
Reply
Kriti
18/7/2021 02:13:26 pm
She is not poreeti she is Preeti hahahaha lol
Xxx
13/1/2017 06:20:22 pm
Gd bt not sufficient
Reply
Ritul
10/4/2017 04:51:43 pm
Questions are not up to mark
Reply
shreyas
17/4/2017 10:03:42 am
witty
Reply
Namrata Munjal
29/4/2017 05:57:13 pm
EXCELLENT.. but it would be greatest in the world if there are some typical and brainstromers . The difficult ones...😊😅🍼🌰🌰
Reply
Chirstina
3/5/2017 11:20:08 pm
Superb loved it
Reply
Mom
4/5/2017 01:06:19 pm
Monkey
Reply
saanya
12/5/2017 05:41:26 pm
Bekar kuchh kam ka nahe
Reply
Hnv
21/5/2017 09:03:43 am
Nice
Reply
Khushi
24/5/2017 04:08:23 pm
I can't say it is not helpful but I need more equations....
Reply
chandni
28/5/2017 10:25:47 pm
Good and topic based question
Reply
Sid
3/6/2017 08:16:42 am
Good
Reply
Kenny S
3/6/2017 08:22:57 am
Its good
Reply
Rohan
3/6/2017 09:00:01 am
,,,,
Reply
Naisha
16/6/2017 11:17:08 pm
not suffiicient 4 me...
Reply
Rudraj Umesh Patil
26/6/2017 10:48:18 am
Liked it.
Reply
janhavi
29/6/2017 10:22:21 am
this site is very helpful for us but very less questions are there
Reply
Priyanshi
9/7/2017 06:00:49 pm
Not enough😑😑😑😑
Reply
Yuvraj singh chiral
10/7/2017 03:07:32 pm
Not helpful😔😔😔😔😓
Reply
Kunju
16/10/2017 09:38:19 pm
I couldn't understand any of those.
Reply
Sumit bisht
17/5/2020 03:20:47 pm
Fuck up your mother.
srishti
1/11/2017 04:34:20 pm
it really contains all the numericals which i want ............so thank u sooo much it really helped me a lot ........
Reply
La
27/12/2017 12:20:01 pm
write simple numericals
Reply
Arruu
22/2/2021 03:10:48 pm
Marjaa mc
Reply
Manish
3/2/2018 06:41:54 am
cool better
Reply
Àmmu
23/2/2018 09:45:41 am
I not like this numericals.......😝😝😝😝😝😝
Reply
Utkarsh
1/5/2018 11:54:30 am
Good numericals but very less
Reply
Diksha
30/5/2018 03:14:20 pm
No enough problems,🏡😘😘😕😕
Reply
Hardeep
31/5/2018 07:18:28 pm
Not so good...😕
Reply
KAtty Priya
4/6/2018 09:26:30 am
Nice
Reply
9/6/2018 01:45:12 pm
What the duck is this........?????
Reply
Dope
14/6/2018 12:47:59 pm
Kiddish
Reply
Anika
1/7/2018 09:28:22 am
Pagal h kya be
Reply
Ishika
2/7/2018 01:13:15 am
I love this website bcz it helps me a lot in my studies
Reply
2
13/7/2018 12:44:02 pm
.
Reply
1111
13/7/2018 12:42:57 pm
not enough questions...need some high level ones. they are not sufficient for exam preparation
Reply
modi
24/1/2019 04:52:55 pm
I like to do questions but do potty
Reply
Bshshxhhs
2/12/2019 05:30:26 am
Black
Reply
clara
27/4/2020 01:52:14 pm
good questions .
Reply
MC BC
10/5/2020 10:38:18 pm
Wpwoeoeeowp
Reply
Kash u
9/6/2020 03:17:51 pm
Very bad numericals
Reply
anao
24/6/2020 04:10:33 pm
l want more equations
Reply
Yogita
13/5/2021 04:42:15 pm
Yes I also
Vicky
5/7/2020 07:20:03 am
Chup dunga na ek kantap
Reply
Prayash
5/7/2020 12:35:27 am
Silly questions
Reply
Shalu
8/2/2021 09:48:14 pm
Very good
Reply
ayush
18/6/2021 09:36:14 am
this is not bad . this site is not bad , i like this site
Reply
Kriti
18/7/2021 02:18:21 pm
Hey guys why are you fighting just stay happy and healthy because corona the students can't go to school but don't fight doctors are doing their best and .very soon we will defeat corona..and I don't want to say anything ok have a nice day 🙏🏻🙏🏻🇮🇳🇮🇳🇮🇳🇮🇳
Reply
something
9/7/2022 08:06:28 pm
.....................................................................................................................................................................................................hunger strike
Reply
something
9/7/2022 08:07:30 pm
Hey guys , whats up?
Reply
something
9/7/2022 08:08:11 pm
i hate .......
Reply
something
9/7/2022 08:08:52 pm
damn pls reply
Reply
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