M&F-Test-7

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Question 1:

What is the velocity at which an ant progresses?

A) 0.1 ms^-1
B) 0.01 ms^-1
C) 1.0 ms^-1
D) 100 ms^-1

Topic: Speed Measurements in Biology

Correct Answer: B) 0.01 ms^-1

Short Hint:

The speed of smaller organisms, like ants, is quite low when measured in standard units, making Option B the most plausible answer.
The given measurement, 0.01 ms^-1, accurately depicts the slow pace at which an ant typically moves.
Consequently, the correct answer is B, "0.01 ms^-1".

Question 2:

Who was the founder of the theoretical framework known as Relativistic Mechanics?

A) Newton
B) Kepler
C) Faraday
D) Einstein

Topic: Fundamental Concepts in Physics

Correct Answer: D) Einstein

Short Hint:

Relativistic Mechanics, the theory that involves velocities approaching the speed of light, was introduced by D. Albert Einstein.
This is encapsulated by the famous equation E=mc².
Therefore, the correct response is D, "Einstein."

Question 3:

By what factor does the minimum stopping distance of a vehicle increase if its speed is tripled?

A) 3
B) 9
C) 6
D) 12

Topic: Mathematical Concepts in Physics

Correct Answer: B) 9

Short Hint:

According to the equation of motion V² = U² + 2aS, if the final velocity (V) is zero, the relation simplifies to U²=2aS.
To maintain the balance of the equation, if the initial velocity (U) is tripled, the stopping distance (S) must be multiplied by 9.
Thus, the correct answer to this question is B, "9".

Question 4:

What term is used to define a negative acceleration?

A) Absolute acceleration
B) Change in velocity
C) Final acceleration
D) Retardation

Topic: Fundamentals of Acceleration

Correct Answer: D) Retardation

Short Hint:

Negative acceleration, which occurs when the velocity of an object decreases, is referred to as "Retardation."
This term means that the object is slowing down over time.
Consequently, the correct answer is D, "Retardation."

Question 5:

What factor does the distance a body travels after being dropped from a tower depend on?

A) The body's mass
B) The tower's height
C) The body's weight
D) The square of the time it takes for the body to fall

Topic: Motion and Gravity

Correct Answer: D) The square of the time it takes for the body to fall

Short Hint:

The distance (S) a body travels when dropped from a height can be calculated using the formula S = ½ gt², where g is the acceleration due to gravity and t is the time it takes for the body to fall.
This formula tells us that the distance traveled is related to the square of the elapsed time (D).
Therefore, the correct answer is D, "The square of the time it takes for the body to fall."

Question 6:

Which law of physics states that forces exist in pairs?

A) The Law of Inertia
B) The Second Law of Motion
C) The Law of Thermodynamics
D) The Third Law of Motion

Topic: Newton's Laws of Motion

Correct Answer: D) The Third Law of Motion

Short Hint:

For every action, there is an equal and opposite reaction, according to Newton's Third Law of Motion.
This law implies that forces exist in pairs; each force has a counterforce that is equal in magnitude but opposite in direction.
Thus, the correct answer is D, "The Third Law of Motion".

Question 7:

Which of Newton's laws is also known as the Law of Inertia?

A) The First Law
B) The Third Law
C) The Second Law
D) All: First, Second, and Third Laws

Topic: Newton's Laws of Motion

Correct Answer: A) The First Law

Short Hint:

The First Law of Motion, also known as the Law of Inertia, says that objects at rest tend to remain at rest, while objects in motion tend to maintain the same speed and direction.
When an object experiences inertia, it resists any change in its state of motion.
As a result, the correct answer is A, "The First Law".

Question 8:

Which type of bullet would be most effective for knocking down a bear clown?

A) Bullet made of rubber
B) Bullet made of lead
C) Bullet made of plastic
D) Bullet made of stone

Topic: Impulse and Force

Correct Answer: A) Bullet made of rubber

Short Hint:

The effectiveness of a bullet in knocking down a bear clown can be determined by the impulse, which is the product of force and the time of collision (I = F × t).
A rubber bullet, due to its elasticity, would have a longer time of collision, resulting in a larger impulse force.
Therefore, the correct answer is A, "Bullet made of rubber."

Question 9:

It is possible to drop two objects with different masses (m1 and m2) from different heights (h1 and h2). What is the ratio of the time taken for each object to fall this distance?

A) h1/h2
B) m1/m2
C) h2/h1
D) m2/m1

Topic: Gravity and Motion

Correct Answer: C) h2/h1

Short Hint:

The time taken for an object to fall a certain distance can be determined by the formula h = ½ gt², where h is the height, g is the gravitational constant, and t is the time.
From this formula, we can deduce that the ratio of times taken by the two objects to travel their respective distances is proportional to the square root of the heights (h2/h1).
Hence, the correct answer is C, "h2/h1".

Question 10:

If a projectile achieves a range R when the angle of projection is 60^o, what is the value of the other angle of projection for the same range?

A) 40^o
B) 30^o
C) 50^o
D) 20^o

Topic: Projectile Motion

Correct Answer: B) 30^o

Short Hint:

For a fixed speed, the range of a projectile will be the same at two angles that sum to 90^o, regardless of the angle of projection.
Therefore, if the range is R at 60^o, the other angle that will give the same range is 30^o (since 60^o + 30^o = 90^o).
Consequently, the correct answer is B, "30^o".

Question 11:

Consider a body that starts from a certain location and eventually returns to that exact location. Which of the following statements is accurate?

A) The average speed is zero, but the average velocity is not zero.
B) Both the average speed and velocity are dependent on the path taken.
C) Both the average speed and velocity are zero.
D) The average velocity is zero, but the average speed is not zero.

Topic: Velocity and Speed

Correct Answer: D) The average velocity is zero, but the average speed is not zero.

Short Hint:

In order to determine the average speed, divide the total distance traveled by the total time taken.
In order to determine average velocity, divide the total displacement by the total time taken.
In a looped path, while the total distance traveled is not zero, the total displacement (final position - initial position) is zero.
Therefore, the correct answer is D, "The average velocity is zero, but the average speed is not zero."

Question 12:

What force is responsible for causing an explosion?

A) A force from outside the system
B) A force from within the system
C) The force due to mass defects
D) The force due to velocity

Topic: Forces

Correct Answer: B) A force from within the system

Short Hint:

An explosion is primarily caused by a sudden release of energy, which is generally due to an internal force.
This force expands outward, causing the materials or substances present to explode.
Hence, the correct answer is B, "A force from within the system."

Question 13:

What type of path does a projectile follow?

A) Hyperbola
B) Straight line
C) Parabola
D) Ellipse

Topic: Projectile Motion

Correct Answer: C) Parabola

Short Hint:

In an ideal situation where air resistance is neglected, the path of a projectile is parabolic.
This path is determined by the object's initial velocity, the angle of projection, and the acceleration due to gravity.
Consequently, the correct answer is C, "Parabola."

Question 14:

At what angle of launch does a projectile achieve the same range (R) and height (H)?

A) 45^o
B) 30^o
C) 76^o
D) 60^o

Topic: Projectile Motion

Correct Answer: C) 76^o

Short Hint:

In addition to the angle of launch, the initial velocity affects the range and height of a projectile.
In specific conditions, when the angle of launch results in the range being equal to the height, the angle is 76^o.
Therefore, the correct answer is C, "76^o".

Question 15:

Which statement about Newton's third law of motion is incorrect?

A) The forces have the same magnitude.
B) The forces act in opposite directions.
C) The forces are exerted on separate bodies.
D) The forces act on the same body, striking a balance.

Topic: Newton's Laws of Motion

Correct Answer: D) The forces act on the same body, striking a balance.

Short Hint:

It is said that every action must be countered by an equal and opposite reaction according to Newton's third law.
This implies that the forces have the same magnitude, act in opposite directions, and apply to different bodies.
The forces do not act on the same body or maintain equilibrium, making option D incorrect.
Thus, the correct answer is D, "The forces act on the same body, striking a balance."

Question 16:

What type of collision results in the conserved kinetic energy of the system?

A) Elastic collision
B) Inelastic collision
C) Partially elastic collision
D) Any of these

Topic: Collisions

Correct Answer: A) Elastic collision

Short Hint:

In an elastic collision, both the momentum and kinetic energy of the system remain conserved.
Thus, when kinetic energy remains constant throughout the collision, it is termed an 'elastic collision.'
Therefore, the correct answer is A, "Elastic collision".

Question 17:

By what amount does the kinetic energy increase if the momentum is amplified by 20%?

A) 44%
B) 55%
C) 66%
D) 77%

Topic: Kinetic Energy and Momentum

Correct Answer: A) 44%

Short Hint:

The kinetic energy (E) and momentum (P) of a body are related by the formula P = √(2mE), where m is the mass of the body.
If the momentum increases by 20%, the kinetic energy will increase by the square of this increase, which is 44%.
Hence, the correct answer is A, "44%".

Question 18:

What is the typical swimming velocity of a human?

A) 0.1 ms-1
B) 3 ms-1
C) 2 ms-1
D) 4 ms-1

Topic: Velocity

Correct Answer: C) 2 ms-1

Short Hint:

The speed of swimming is dependent on several factors, including the physical capabilities and technique of the swimmer.
However, on average, the velocity at which a human can swim is approximately two ms-1.
Therefore, the correct answer is C, "2 ms-1".

Question 19:

Upon which principle of conservation does a rocket operate?

A) Energy
B) Momentum
C) Mass
D) Charge

Topic: Conservation of Momentum

Correct Answer: B) Momentum

Short Hint:

A rocket propels itself upwards by ejecting gases in the opposite direction.
This is in accordance with the principle of conservation of momentum.
Initially, before firing, the total momentum is zero. After firing, the momentum of the escaping gases is equal and opposite to that of the rocket, maintaining the total momentum at zero.
So, the correct answer is B, "Momentum".

Question 20:

What is the dimensionality of a projectile's motion?

A) One
B) Three
C) Two
D) Four

Topic: Projectile Motion

Correct Answer: C) Two

Short Hint:

The path of a projectile in motion is determined by two independent motions: the constant vertical motion due to gravity and the constant horizontal velocity.
Together these result in a two-dimensional trajectory.
That's why the motion of a projectile is considered two-dimensional, as it moves in two directions (up/down and left/right) simultaneously.
Hence, the correct answer is C, "Two".

Question 1:

Topic: Speed Measurements in Biology

Question 2:

Topic: Fundamental Concepts in Physics

Question 3:

Topic: Mathematical Concepts in Physics

Question 4:

Topic: Fundamentals of Acceleration

Question 5:

Topic: Motion and Gravity

Question 6:

Topic: Newton's Laws of Motion

Question 7:

Topic: Newton's Laws of Motion

Question 8:

Topic: Impulse and Force

Question 9:

Topic: Gravity and Motion

Question 10:

Topic: Projectile Motion

Question 11:

Topic: Velocity and Speed

Question 12:

Topic: Forces

Question 13:

Topic: Projectile Motion

Question 14:

Topic: Projectile Motion

Question 15:

Topic: Newton's Laws of Motion

Question 16:

Topic: Collisions

Question 17:

Topic: Kinetic Energy and Momentum

Question 18:

Topic: Velocity

Question 19:

Topic: Conservation of Momentum

Question 20:

Topic: Projectile Motion

Test Results