WELCOME TO PHYSICS

PRESENTATION

INTRODUCE GROUP

MD. SHAHINUR RAHMANID: 2015200000009

MD. MAZED HOSSAIN ID: 2015200000002

GROUP NAME: “VECTOR”

INTRODUCE MYSELF

NAME: MD. SHAHINUR RAHMANSOUTHEAST UNIVERSITYDEPT: COMPUTER SCIENCE ENGINEERINGID: 2015200000009SEM: FALL 15BATCH: 41SECTION: 01

Our Topic is Mechanics

Our Topics List

1.0 Inertia1.1 Inertia of rest1.2 Inertia of motion

2.0 Fundamental Force2.1 Type of Fundamental Force

3.0 Work done by variable force in expanding a spring

4.0 Work-energy theorem5.0 Motion of a projectile

Inertia: Inertia is the tendency of a body to resist a change in motion or rest.

Picture of inertia

Inertia are two types1) Inertia of rest: It's a property associated with mass. Inertia of rest is a measure of a

tendency of the object not to leave from its permanent resting place.

2) Inertia of motion: A body which is in the state of motion, has inertia of motion and it continues to be in the state of motion with the same speed in the same direction in a straight line unless an external force is applied on it to change its state.

Fundamental forces

Fundamental forces: Those forces which are fundamental and do not originated from other forces, but all other forces can be expressed in terms. Those force are called fundamental forces.

Fundamental forces are Four types

1. Gravitational Force 2. Electromagnetic Force

3. Weak Nuclear Force 4. Strong Nuclear Force

Work done by variable force in expanding a spring

Fr ∝ -x∴ Fr = -kx [Spring Constant, k]

Here, F= - Fr = -(-kx) = kx

Work done by variable force in expanding a spring

Now, w = = = k = k[]

= ∴w =

WELCOME AGAIN

INTRODUCE MYSELF

NAME: MD. MAZED HOSSAINSOUTHEAST UNIVERSITYDept: Computer science engineeringID: 2015200000002SEM: FALL 15BATCH: 41SECTION: 01

1.0 Work-energy theorem

2.0 Motion of a projectile

MY TOPICS

Work-energy theorem = + =

Now, w = Fs= ma = m ()= m - m

Final K.E – Intial K.E

Motion of a projectile:

= cos = s∝

= t = cosAt t=t and point P,x=ON= cos. t∴ t= ………………….(1)

Again, = + = s∝ - gt

At t=t and point P, y = PN = t + Þy = s∝ - g Þ y = x tan -Þ y = (tan) x – ( )

∴ y = bx - c

Maximum height:

Þ 0 = Þ 0 =

∴ H =

When, =; = =

Time to reach maximum height: = + 0 = s∝ -gt

∴ t =

Time Flight:

=

Horizontal range = = cos Þ = Þ =

When, = ; = =

Thank You Sir!