Numerical Problems Chapter 3 Forces and Motion l First Year Physics Federal Board KPK Syllabus

1. An object is falling freely under gravity. How much distance will it travel in 2nd and 3rd second of its journey?
2. A helicopter is ascending vertically at a speed of 19.6 ms-1. When it is at a height of 156.8 m above the ground, a stone is dropped. How long does the stone take to reach the ground?
3. A car moving at 20.0 m/s (72.0 km/h) crashes into a tree. Find the magnitude of the average force acting on a passenger of mass 70 kg in each of the following cases. (a) The passenger is not wearing a seat belt. He is
brought to rest by a collision with the windshield and dashboard that lasts 2.0 ms. (b) The car is equipped with a passenger-side air bag. The force due to the air bag acts for 45 ms, bringing the passenger to rest.
4. A 0.4 kg ball traveling with the speed of 15 m s-1 strikes a rigid wall and rebounds elastically. If the ball is in contact with the wall for 0.045 s, what is (a) the momentum imparted to the wall and (b) the average force exerted on the wall?
5. One ball of mass 0.600 kg traveling 9.00 m/s to the right collides head on elastically with a second ball of mass 0.300 kg traveling 8.00 m/s to the left. After the collision, what are their velocities after collision?
6. In a wedding a bullet is fired in air at a speed of 500 m/s making an angle of 60o with horizontal from an AK-47 rifle. (a) How high will the bullet rise? (b) What time would it take to reach ground? (c) How far would it go? (Ignore air resistance)
7. The catapult hurls a stone of mass 32.0 g with a velocity of 50.0 m/s at a 30.0° angle of elevation. (a) What is the maximum height reached by the stone? (b) What is its range? (c) How long has the stone been in the air when it returns to its original height?

[Tayy]

Jazak Allah sir thank you alot. You explained in the easiest way. May Allah bless you

[AsY-vhlg]

Sir apny last waly numerical mai 2 bar thita ki value put kardi, but apny sab boht acha samjhya thanku so much,

[AhmadRazaAhmad-qqee]

Jazakallah sir....itna accha to Meri college mam bhi convey nahi kr sakein jitna accha aap ne kr dia...thank you so much sir...Allah may give you lot in return❤️

[muhammadriaz]

Thanks sir totally dependent on your YouTube channel

[worldofar]

24:18 oo oo
Dil ghalti kar betha hai

[Iam.rich]

Thank you sir g Allah pak apko hamesha khush Ra k ❤

[seyanshah]

Easy method and best explanation thanks a lot sir ♥️👍

[MuhammadMushtaq-zh]

Mashallah 🌺 Well Explained ...May Allah SWT bless you with more knowledge ✨✨

[MuhammadYousaf-ehcr]

May Allah give you this Struggle Gift Ameen!

[atikanazgull]

Best explanation sir thank you so much😍😍

[Sweetteacher-ko]

Thank you so much Sir 🥺♥️
MAY YOU LIVE LONG ♥️♥️✨

[mughalmughal]

Sir MASHAALLAH ❣️ bohat Achi trha smajhata Hain alhumdulilah bohat faida hota ha ..jaisa ap Ka style ha samajhna Ka... alhumdulilah ❤️...may ALLAH RABULIZAT gives your channel 1 million very soon insha'Allah ❤️

[amjadaziz]

Very helpful video sir keep on uploading sir

[Haanni]

Thankyou sir your videos are very helpful

[mrizwan]

Jazak Allah Sir, May Allah SWT bless you and your family's life.Keep on uploading such tremendous lectures.

[GhousiaAuto]

Allah ap ko is ka ajar da bohat acha samjata ha

[kiranhashmi]

Thank you sir for saving me from failing my test

[hassanvlog]

Tysm sir your notes are too easy to understand ❤❤❤

[Wild_life_S]

Sir chapter 4 ka numericals kahan han ap na nahi karway plz karwa dain mujay nahi mil rhe han plz😊

[mrjack]

Respected Sir, , numricl 4 mai minus q aata hai???initial momentum is equal to final momentum....Is that minus sign shows opposite direction??