Master Kinetics: Enhance Your Understanding of Motion and Forces

Question 1

Two objects with different masses are dropped from the same height simultaneously. Neglecting air resistance, which statement is accurate?

Accepted Answer

Both objects will reach the ground simultaneously.

Answer

The heavier object will reach the ground first.

Answer

The lighter object will reach the ground first.

Answer

The heavier object will hit with greater force.

Question 2

Which of the following does NOT affect the moment of inertia of a body?

Accepted Answer

Linear velocity of the body

Answer

Mass of the body

Answer

Distribution of mass around the axis of rotation

Answer

Shape of the body

Question 3

A projectile is launched at an angle to the horizontal. At the highest point of its trajectory, which of the following forces is acting on the projectile?

Accepted Answer

Gravity only

Answer

Air resistance only

Answer

Gravity and air resistance only

Answer

Thrust and drag only

Question 4

A gymnast performing a backflip experiences a moment of inertia about their center of mass. Which action would increase this moment of inertia?

Accepted Answer

Extending their limbs away from their body

Answer

Tucking their limbs close to their body

Answer

Increasing their angular velocity

Answer

Decreasing their mass

Question 5

A cyclist is riding steadily along a flat road. Which of the following forces is NOT acting on the cyclist?

Accepted Answer

Thrust

Answer

Weight

Answer

Normal force

Answer

Air resistance

Question 6

Which of the following is NOT a valid unit of angular velocity?

Accepted Answer

Hertz

Answer

Radians per second

Answer

Degrees per second

Answer

Revolutions per minute

Question 7

Which of the following is an example of rectilinear motion?

Accepted Answer

Running

Answer

Jumping

Answer

Swimming

Answer

Cycling

Question 8

What is the SI unit of momentum?

Accepted Answer

Kilogram metres per second

Answer

Kilogram

Answer

Newton

Answer

Metres per second

Question 9

Which of the following is a vector quantity?

Accepted Answer

Velocity

Answer

Mass

Answer

Time

Answer

Temperature

Question 10

What is the effect of friction on the motion of an object?

Accepted Answer

Decreases its acceleration

Answer

Increases its acceleration

Answer

Changes its direction of motion

Answer

No effect on its motion

Question 11

Which of the following is used to measure the force acting on an object?

Accepted Answer

Force transducer

Answer

Pressure gauge

Answer

Stopwatch

Answer

Graduated cylinder

Question 12

Which of the following is NOT a type of force that can act on the human body during physical activity?

Accepted Answer

Magnetic force

Answer

Contact force

Answer

Gravitational force

Answer

Frictional force

Question 13

The SI unit of force is known as the:

Accepted Answer

Newton

Answer

Kilogram

Answer

Joule

Answer

Watt

Question 14

According to Newton's Second Law of Motion, an unbalanced force acting on an object will:

Accepted Answer

Cause the object to move in the same direction as the force

Answer

Cause the object to remain at rest

Answer

Cause the object to move in the opposite direction of the force

Answer

Have no effect on the object

Question 15

Which of the following factors does NOT influence the magnitude of the gravitational force between two objects?

Accepted Answer

Temperature of the objects

Answer

Mass of the objects

Answer

Distance between the objects

Answer

Shape of the objects

Question 16

What is the distinction between weight and mass?

Accepted Answer

Weight is a measure of the force of gravity acting on an object, while mass is a measure of the amount of matter in an object.

Answer

Weight is a measure of the amount of matter in an object, while mass is a measure of the force of gravity acting on an object.

Answer

Weight and mass are equivalent concepts.

Answer

Weight is a vector quantity, while mass is a scalar quantity.

Question 17

Which of the following is NOT a type of moment encountered in physical activities?

Accepted Answer

Frictional moment

Answer

Clockwise moment

Answer

Anticlockwise moment

Answer

Resultant moment

Question 18

Which of the following factors does NOT affect the magnitude of a moment?

Accepted Answer

Mass of the object

Answer

Magnitude of the force applied

Answer

Distance from the pivot point

Answer

Angle of application of the force

Question 19

According to Newton's second law of motion, the acceleration of an object is primarily influenced by:

Accepted Answer

The force applied to the object

Answer

The object's mass

Answer

The object's velocity

Answer

The object's momentum

Question 20

Which factor does NOT contribute to the moment of inertia of a rotating body?

Accepted Answer

Velocity of rotation

Answer

Mass

Answer

Distribution of mass

Answer

Shape

Question 21

Which movement typically involves the largest angular displacement?

Accepted Answer

Jumping

Answer

Walking

Answer

Running

Answer

Cycling

Question 22

The center of mass of the human body is generally located:

Accepted Answer

At the level of the navel

Answer

At the level of the shoulders

Answer

At the level of the hips

Answer

At the level of the head

Question 23

Which device is commonly used to measure ground reaction force in human movement?

Accepted Answer

Force plate

Answer

Electromyography

Answer

Accelerometer

Answer

Goniometer

Question 24

A person with a mass of 70 kg stands atop a 1.5-meter high platform. Calculate their potential energy relative to the ground.

Accepted Answer

1050 J

Answer

105 J

Answer

10500 J

Answer

10 J

Question 25

Which of the following is the SI unit for measuring power?

Accepted Answer

Watt

Answer

Newton

Answer

Joule

Answer

Meter per second

Question 26

A 15 kg object is moving at a speed of 4 m/s. What is its kinetic energy?

Accepted Answer

120 J

Answer

60 J

Answer

240 J

Answer

480 J

Question 27

Which quantity can be described by a single numerical value and does not have a direction?

Accepted Answer

Speed

Answer

Velocity

Answer

Acceleration

Answer

Displacement

Question 28

What is the formula used to calculate the work done by a force?

Accepted Answer

W = Fd

Answer

W = Fv

Answer

W = Fs

Answer

W = Ft

Question 29

A mass of 12 kg is lifted vertically through a height of 3 meters. Calculate the work done against the force of gravity.

Accepted Answer

108 J

Answer

36 J

Answer

324 J

Answer

1296 J

Question 30

Which of the following types of joints offers the most extensive range of movement?

Accepted Answer

Ball-and-socket joint

Answer

Saddle joint

Answer

Hinge joint

Answer

Pivot joint

Question 31

A runner moves at a constant velocity of 5 m/s. Determine their acceleration.

Accepted Answer

0 m/s^2

Answer

10 m/s^2

Answer

5 m/s^2

Answer

15 m/s^2

Question 32

Which of Newton's Laws of Motion describes the relationship between an object's mass, acceleration, and the force acting upon it?

Accepted Answer

Newton's Second Law

Answer

Law of Conservation of Energy

Answer

Newton's Third Law

Answer

Newton's First Law

Question 33

An individual stands on a weighing scale. When they lift their leg, what occurs to the reading on the scale?

Accepted Answer

Decreases

Answer

Stays the same

Answer

Oscillates

Answer

Increases

Question 34

A dancer jumps and lands with their knees somewhat bent. What is the main reason for this bending?

Accepted Answer

To absorb impact forces and minimize the risk of injury

Answer

To increase height

Answer

To maintain balance

Question 35

Which of the following is **not** a type of lever present in the human body?

Accepted Answer

Class 4 lever

Answer

Class 2 lever

Answer

Class 1 lever

Answer

Class 3 lever

Question 36

When a diver jumps into a pool, the force exerted by the water on the diver is:

Accepted Answer

Equal in magnitude and opposite in direction to the force exerted by the diver on the water

Answer

Less than the force exerted by the diver on the water

Answer

Greater than the force exerted by the diver on the water

Question 37

Which type of force opposes the motion of an object and acts in the opposite direction?

Accepted Answer

Friction

Answer

Normal

Answer

Tension

Answer

Gravity

Question 38

If a person moves closer to the pivot point on a seesaw, what will happen to the moment of their weight?

Accepted Answer

Decrease

Answer

Reverse direction

Answer

Remain the same

Answer

Increase

Question 39

What is the formula for calculating linear momentum?

Accepted Answer

Mass × Velocity

Answer

Kinetic energy / Time

Answer

Power / Force

Answer

Force / Time

Question 40

In a closed system, the total initial momentum is:

Accepted Answer

Equal to the total final momentum

Answer

Less than the total final momentum

Answer

Greater than the total final momentum