ICS Part 1 Physics English Medium Chapter 3 Online Short Questions Test with Answers

Question # 1

What is ballistic missile? Define ballistic trajectory.

Ans 1: The missile in which it is given an initial push and is then allowed to move freely due to inertia and under the action of gravity is called ballistic and the path followed by such a projectile is called ballistic trajectory.

Question # 2

Can the velocity of an object reverse the direction when acceleration is constant? If so, given an example.

Ans 1: Yes, the velocity of a body can reverse its direction with constant acceleration For example, when a body is thrown vertically upward under the action of gravity, the velocity of the object will go on decreasing because force of gravity is acting downward.
When the object reaches the maximum height , its velocity becomes zero, and then the object reverses its direction of motion and start moving vertically downward.During the whole process, the magnitude of the acceleration due to gravity remains constant.

Question # 3

Discuss the condition of equilibrium ?

Ans 1:
Newtons 1st Law of motion: This Law states that "A body at rest will remain at rest and a body in motion will continue its motion with uniform velocity unless it is acted upon by some unbalanced external force
If F = 0 Then a = 0
Explanation: The Ist law of motion is also known as law of inertia. The inertia is the property of a body which opposes any change in its state of motion or rest. Actually, when some force is applied on a body for changing its state of rest or uniform motion, then the body will affer resistance against this change. In the word, We can say that all the bodies try to maintain its state of rest or continue its uniform motion due to inertia. That is the why the newtons Ist law is also known as law of inertia.
Examples:When we give a jerk to the branch of a tree, then the fruit falls down. It is because, when we give a jerk, the branch of the tree comes into motion suddenly.
When a bus starts motion suddenly, the passengers experience a push in the back ward direction It is because, when the bus starts motion suddenly, the lower parts of the passenger in contact with the seats also come into motion. while the upper parts of the passengers are at remain at the rest In this attempt, they falls in the back words directions
Newton's 2nd Law of motion:
Statements: This law states that, "when a force is applied on a body, then acceleration is produced in the body in the direction of applied force and inversely proportional to the mass of the body.
Explanation: The Ist Law of motion gives us the quantitative measurements of force, While the 2nd law of motion gives us the quantitative measurements of forces. now if the direction of motion of the body and direction of motion of the body and direction of forces are the same, then its velocity and acceleration increases. If the direction of motion of the body and direction of force are opposite in direction of force are opposite in direction, then the velocity and acceleration of the body will decreases gradually and finally become zero and the body will come to rest
Example of newtons 2nd law of motion:
When a body falls on a solid floor from the top of a building, the body experience or feel great pain. It is because, when the body falls on the floor, its acceleration become zero suddenly and the body faces huge force for very short period of time
Newton,s 3rd Law of motion:
This Law states that for every action, there is always a reaction. These forces are equal in magnitude but opposite in direction.
Explanation: This law tells us that no body can experience a force from its surrounding, until this body exerts any force on its surrounding It means That forces are exerted in pairs.

Question # 4

Under what condition, the instantaneous and average velocities of a moving object become equal?

Ans 1: For a body moving with uniform velocity, its average and instantaneous velocities are equal.

Question # 5

Derive an equation for the position vector of projectile?

Ans 1:

Question # 6

Define free fall motion? Also define the acceleration due to gravity ?

Ans 1: If we drop an object from certain height height 'h' and ignore the air resistance then such motion of the body is known as free fall motion. the acceleration of free fall body is known as acceleration due to gravity.
It is represented by 'g' Its value varies with altitude and depth. On earth surface or near earth surface its value is 9.8 m/sec²

Question # 7

Define elastic and inelastic collisions.

Ans 1: Elastic collisions: A collision in which the K.E. Of the system is conserved is called elastic collision.
Inelastic collisions: A collision in which the K.E.of the system is not conserved is called inelastic collision.

Question # 8

Motion with constant velocity is a special case of motion with constant acceleration.Is this statement true?

Ans 1: Yes, this statement is true. When a body moves with constant velocity in the straight line, its acceleration is zero.Hence,The acceleration of the body will always remain constant during such motion.As the zero is a constant quantity, therefore this is a special case of motion.

Question # 9

Why a safety helmet of a motor cycle's is padded?

Ans 1: A motor cycle's safety helmet is padded so as to extend the time of collision to prevent serious injury.

Question # 10

Define the following terms?
Position,
Uniforms
speed,
variable speed
average speed,
Instantaneous speed,

Ans 1: Position:The location of an object relative to some reference point origin is known as position.
Speed:The distance between covered by a moving body in one second is known as speed
Speed = Distance covered /Time
The speed is a scalar quantity. Its S.I unit is " m/sec" .
Uniform Speed:A body is said to be moving with uniform speed, if it equal distance in equal intervals of time.
Variable Speed:A body is said to be moving with variable speed if it covers unequal distance in equal intervals of time.
Average Speed:The average speed of a moving body can be atained by dividing total distance covered by total time taken
Instantaneous Speed:The speed of a body at any particular instant of time is known as instantaneous speed.

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ICS Part 1 Physics English Medium Chapter 3 Online Short Questions Test with Answers

Online Short Questions For Chapter 3 "ICS Part 1 Physics Chapter 3 Short Questions Test "

Physics - ICS Part 1 Physics Chapter 3 Short Questions Test

What is ballistic missile? Define ballistic trajectory.

Can the velocity of an object reverse the direction when acceleration is constant? If so, given an example.

Discuss the condition of equilibrium ?

Under what condition, the instantaneous and average velocities of a moving object become equal?

Derive an equation for the position vector of projectile?

Define free fall motion? Also define the acceleration due to gravity ?

Define elastic and inelastic collisions.

Motion with constant velocity is a special case of motion with constant acceleration.Is this statement true?

Why a safety helmet of a motor cycle's is padded?

Define the following terms?Position,Uniformsspeed,variable speedaverage speed,Instantaneous speed,

Prepare Complete Set Wise Questions For Chapter 3 "ICS Part 1 Physics Chapter 3 Short Questions Test "

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

ICS Part 1 Physics Chapter 3 Short Questions Test - Set 1

What is ballistic missile? Define ballistic trajectory.

Can the velocity of an object reverse the direction when acceleration is constant? If so, given an example.

Discuss the condition of equilibrium ?

Under what condition, the instantaneous and average velocities of a moving object become equal?

Derive an equation for the position vector of projectile?

Define free fall motion? Also define the acceleration due to gravity ?

Define elastic and inelastic collisions.

Motion with constant velocity is a special case of motion with constant acceleration.Is this statement true?

Why a safety helmet of a motor cycle's is padded?

Define the following terms?Position,Uniformsspeed,variable speedaverage speed,Instantaneous speed,

ICS Part 1 Physics Chapter 3 Short Questions Test - Set 2

Under what conditions a body can move with uniform acceleration?

Name the quantities which can be calculated from velocity-time graph and these can be calculated ?

What is principle of rocket propulsion speed?

State law of inertia?

Derive an equation for the position vector of projectile?

How is the distance calculated from velocity time graph?

State and explain Newton's second law of motion.

Define momentum and write down its unit.

Define total of flight. Derive a mathematical expression for it ?

Discuss the displacement-time Graph?

ICS Part 1 Physics Chapter 3 Short Questions Test - Set 3

At what point or points in its path does a projectile have its minimum speed,its maximum speed?

How is the distance calculated from velocity time graph?

Discuss the momentum changes produced by explosive forces ?

Define elastic and inelastic collisions.

Define rest and motion ?

Define Impulse ? Show that impulse is equal to change in momentum show that J= P

Define linear momentum ? Express Newton,s 2nd Law in terms of momentum?

What is the change in total energy during elastic or inelastic collisions?

Behaviour of bouncing ball?

What is ballistic missile? Define ballistic trajectory.

ICS Part 1 Physics Chapter 3 Short Questions Test - Set 4

Find a relation for magnitude of velocity of projectile and direction of projectile?

What is principle of rocket propulsion speed?

Define linear momentum ? Express Newton,s 2nd Law in terms of momentum?

State law of inertia?

Behaviour of bouncing ball?

Why ballistic missiles are not useful for long ranges?

What are the factors upon which force due to water depend?

At what point or points in its path does a projectile have its minimum speed,its maximum speed?

Define Collision ? Discuss the type of collision?Give example in each case?

Why a safety helmet of a motor cycle's is padded?

ICS Part 1 Physics Chapter 3 Short Questions Test - Set 5

Define the following terms?Position,Uniformsspeed,variable speedaverage speed,Instantaneous speed,

Define ballistics flight and ballistic trajectory.

What is principle of rocket propulsion speed?

What is the effect on the speed of a fighter plane chasing another when it opens the fire? What happens to the speed of purdued plane when it returns the fire?

What is projectile motion? In what direction acceleration is zero in this motion?

State and explain Newton's second law of motion.

Define free fall motion? Also define the acceleration due to gravity ?

Define elastic and inelastic collisions.

Define the following terms?
Position,
Uniforms
speed,
variable speed
average speed,
Instantaneous speed,

Define the following terms?
Position,
Uniforms
speed,
variable speed
average speed,
Instantaneous speed,

Define the following terms?
Position,
Uniforms
speed,
variable speed
average speed,
Instantaneous speed,

Define the following terms?
Position,
Uniforms
speed,
variable speed
average speed,
Instantaneous speed,