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Physics > Force,Mass and Momentum > Flashcards

Force,Mass and Momentum Flashcards

1
Q

What is the formula for calculating force?

A

Force equals mass times acceleration (F = m * a).

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2
Q

True or False: Mass is a measure of the amount of matter in an object.

A

True.

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3
Q

Fill in the blank: The unit of force in the International System of Units (SI) is the ______.

A

Newton.

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4
Q

What is momentum?

A

Momentum is the product of an object’s mass and its velocity (p = m * v).

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5
Q

Multiple Choice: Which of the following is not a unit of mass? A) Kilogram B) Gram C) Newton D) Tonne

A

C) Newton.

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6
Q

What is the law of conservation of momentum?

A

In a closed system, the total momentum before an event is equal to the total momentum after the event.

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7
Q

Fill in the blank: Acceleration is the change in ______ over time.

A

velocity.

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8
Q

What is the relationship between force, mass, and acceleration?

A

Force is directly proportional to mass and acceleration.

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9
Q

Fill in the blank: The momentum of an object is a ______ quantity, meaning it has both magnitude and direction.

A

vector.

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10
Q

What happens to the momentum of an object if its velocity doubles?

A

The momentum also doubles.

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11
Q

Multiple Choice: What is the effect of increasing the mass of an object while keeping acceleration constant? A) Force increases B) Force decreases C) No effect on force D) Force becomes zero

A

A) Force increases.

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12
Q

What is the unit of momentum in the International System of Units (SI)?

A

Kilogram meter per second (kg·m/s).

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13
Q

True or False: Force can change the shape of an object.

A

True.

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14
Q

Fill in the blank: The change in momentum of an object is equal to the ______ applied to it.

A

force.

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15
Q

What type of quantity is mass?

A

Scalar quantity.

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16
Q

True or False: The greater the force applied to an object, the greater its acceleration will be.

A

True.

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17
Q

What is the relationship between acceleration and net force?

A

Acceleration is directly proportional to net force and inversely proportional to mass.

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18
Q

Define Weight

A

The weight of an object is the force of the Earths Gravity

19
Q

Newton’s first law of motion

A

states that every body will remain in a state of rest or travelling with a constant velocity unless an unbalanced external force acts on it

20
Q

Newton’s second law of motion

A

states that when an unbalanced force acts on a body the rate of change of the body’s momentum is directly proportional to the force and takes place in the direction of the force

21
Q

Newton’s third law of motion

A

states that if a body A exerts a force on a body B, then body B exerts an equal but opposite force on body A, i.e. action and reaction are equal and opposite

22
Q

What is the definition of work in physics?

A

Work is defined as the product of the force applied to an object and the distance over which that force is applied in the direction of the force.

23
Q

True or False: Work is a scalar quantity.

A

True

24
Q

Fill in the blank: The formula for calculating work is _____ = Force × Distance × cos(θ).

A

Work

25
Q

What unit is work measured in?

A

Joules (J)

26
Q

What does the term ‘energy’ refer to in physics?

A

Energy refers to the capacity to do work.

27
Q

Multiple choice: Which of the following is a form of mechanical energy? A) Thermal B) Kinetic C) Chemical D) Nuclear

A

B) Kinetic

28
Q

What is kinetic energy?

A

Kinetic energy is the energy of an object due to its motion.

29
Q

Fill in the blank: Kinetic energy can be calculated using the formula _____ = 1/2 mv².

A

KE

30
Q

True or False: Potential energy is energy due to an object’s position.

A

True

31
Q

What is the formula for gravitational potential energy?

A

PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

32
Q

Multiple choice: What is the SI unit of power? A) Joule B) Watt C) Newton D) Pascal

A

B) Watt

33
Q

What is the definition of power in physics?

A

Power is the rate at which work is done or energy is transferred.

34
Q

Fill in the blank: Power can be calculated using the formula _____ = Work / Time.

A

Power

35
Q

True or False: 1 Watt is equal to 1 Joule per second.

A

True

36
Q

What is the work-energy theorem?

A

The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy.

37
Q

Multiple choice: Which of the following does NOT affect the work done on an object? A) Force B) Distance C) Time D) Angle

A

C) Time

38
Q

What is the principle of conservation of energy?

A

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

39
Q

Fill in the blank: The total mechanical energy of a system is the sum of its _____ and _____ energy.

A

kinetic; potential

40
Q

True or False: An object at rest has kinetic energy.

A

False

41
Q

What happens to kinetic energy when an object comes to a stop?

A

The kinetic energy is converted to other forms of energy, such as thermal energy due to friction.

42
Q

Fill in the blank: The formula for power when force and velocity are known is _____ = Force × Velocity.

A

Power

43
Q

What is mechanical energy?

A

Mechanical energy is the sum of kinetic and potential energy in a system.

Physics (4 decks)

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