11th Class Physics Chapter 3 Notes
Important Easy to understand 11th Class Physics Chapter 3 Notes Force and Motion written by Professor Mr. Asad Abbas Suib. These notes are very helpful in the preparation of 11th class physics chapter 3 exercise for students of the 11th class and these are according to the paper patterns of all Punjab Book Boards.
Summary and Contents:
Topics which are discussed in the notes are given below:
- Very Important Multiple Choice Questions 11 class physics chapter 3 mcqs with Answers of the Chapter No. 3: Force and Motion in 1st Year Physics Punjab Book Boards.
- Important 11th class physics chapter 3 question answer from Punjab Textbook.
- What is Difference b/w Rest and Motion?
- What is Difference b/w Distance and displacement?
- What is Difference b/w Speed and velocity?
- What is Difference b/w Average and Instantaneous velocity?
- What is Difference b/w uniform velocity and variable velocity?
- What is Difference b/w Average and instantaneous Acceleration?
- What is Difference b/w uniform Acceleration and variable Acceleration?
- What is Difference b/w Positive and Negative Acceleration?
- Write a note on Velocity time Graph.
- When an object is moving with constant velocity
- When an object is moving with uniform Acceleration
- When an object is moving with variable Acceleration
- Significance of Velocity time graph
- Give Equations of motion.
- State Newton laws of Motion.
- Newton law of inertia/First law of motion
- Definition of mass in terms of inertia
- Inertial frame of reference
- Newton 2nd law of motion
- Newton third law of motion
- What is Momentum? Write its formula and unit.
- State and explain Newton 2nd law in term of linear momentum
- What is Impulse And Impulsive Force?
- State and Explain Law of conservation of linear momentum
- What is Elastic collision and Inelastic collision?
- Discuss Elastic collision in one dimension
- Determination of velocities after collision
- Calculate the formula for Force due to water flow
- Describe Momentum and Explosive forces
- Describe Rocket propulsion.
- What is Projectile Motion? Derive the relations for velocity, time, height and range of projectile.
- Describe the Applications to Ballistic Missile?
- What is the difference between uniform and variable velocity. From the explanation of variable velocity,
define acceleration. Give SI units of velocity and acceleration.
- Important class 11th physics chapter 3 exercise solutions from Punjab Textbook.
- An object is thrown vertically upward. Discuss the sign of acceleration due to gravity, relative to velocity,
while the object is in air?
- Can the velocity of an object reverse direction when acceleration is constant? If so, give an example.
- Specify the correct statement: (a). An object can have a constant velocity even its speed is changing. (b). An object can have a constant speed even its velocity is changing. (c). An object can have a zero velocity even its acceleration is not zero (d). An object subjected to a constant acceleration can reverse its velocity.
- A man standing on the top of a tower throws a ball straight up with initial velocity vi and at the same time
throws a second ball straight downward with the same speed. Which ball will have larger speed when it strikes
the ground? Ignore air friction.
- Explain the circumstances in which the velocity v and acceleration a of a car are(i) Parallel (ii) Anti-parallel
(iii) Perpendicular to one another (iv) v is zero but a is not (v) a is zero but v is not zero
- Motion with constant velocity is a special case of motion with constant acceleration. Is this statement true?
Discuss.
- Find the change in momentum for an object subjected to a given force for a given time and state law of
motion in terms of momentum
- Define impulse and show that how it is related to linear momentum
- State the law of conservation of linear momentum, pointing out the importance of isolated system. Explain,
why under certain conditions, the law is useful even though the system is not completely isolated?
- Explain the difference between elastic and inelastic collisions
- At what point or points in its path does a projectile have its minimum speed, its maximum speed?
- Each of the following questions is followed by four answers, one of which is correct answer. Identify that
answer.
- Important 11th class physics chapter 3 numericals from Punjab Textbook.
- A helicopter is ascending vertically at the rate 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?
- Using the following data, draw a velocity-time graph for a short journey on a straight road of a
motorbike
- Use the graph to calculate
(a) the initial acceleration
(b) the final acceleration and
(c) the total distance traveled by the motorcyclist.
- Two masses
m1
and
m2
are initially at rest with a spring compressed between them. What is the ratio of
the magnitude of their velocities after the spring has been released?
- If there were no force on amoeba other than the reaction force caused by the emerging jet, what
would be the acceleration of the amoeba?
b. If amoeba moves with constant velocity through water, what is force of surrounding water
(exclusively of jet) on the amoeba?
- A boy places a fire cracker of negligible mass in an empty can of 40 g mass. He plugs the end with a
wooden block of mass 200g. After igniting the firecracker, he throws the can straight up. It explodes at the
top of its path. If the block shoots out with a speed of 3.0 ms-1 , how fast will the can be going?
- A truck weighing 2500 kg and moving with a velocity of 21 ms-1 collides with stationary car weighing
1000 kg. The truck and the car move together after the impact. Calculate their common velocity.
- Two blocks of masses 2.0 kg and 0.50 kg are attached at the two ends of compressed spring. The
elastic potential energy stored in the spring is 10 J. Find the velocities of the blocks if the spring delivers its
energy to the blocks when released.
- A foot ball is thrown upward with an angle of
o
30
with respect to the horizontal. To throw a 40 m pass
what must be the initial speed of the ball?
- Important class class 11th physics chapter 3 important questions from Punjab Textbook.
- A ball is thrown horizontally from a height of 10 m with velocity of 21 ms-1. How far off it hit the ground
and with what velocity?
- A bomber dropped a bomb at a height of 490 m when its velocity along horizontal was 300 kmh-1. (a)
How long was it in air? (b) At what distance from the point vertically below the bomber at the instant the
bomb was dropped, did it strike the ground?
- Find the angle of projection of a projectile for which its maximum height and horizontal range are
equal.
- Prove that for angles of projection, which exceed or fall short of
o
45
by equal amounts, the ranges are
equal.
- A SLBM (submarine launched ballistic missile) is fired from a distance of 3000km, If the Earth is
considered flat and the angle of launch is with horizontal, find the velocity with which the missile is fired and
the time taken by SLBM to hit the target.