Kinetics: Forces and Motion in Motor Control

Question 1

Which of the following is a fundamental force acting on the body?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Air resistance

Question 2

According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by an unbalanced force. Which of the following scenarios demonstrates this law?

Accepted Answer

A book sitting on a table

Answer

A ball rolling down a hill

Answer

A car braking to a stop

Answer

A person jumping up and down

Question 3

Which of the following is a measure of the rate of change of angular velocity?

Accepted Answer

Angular acceleration

Answer

Linear acceleration

Answer

Centripetal acceleration

Answer

Force

Question 4

Which of the following is NOT a factor that affects the moment of inertia?

Accepted Answer

Linear velocity

Answer

Mass

Answer

Distance from the axis of rotation

Answer

Shape of the object

Question 5

Which of the following is a unit of torque?

Accepted Answer

Newton-meter (Nm)

Answer

Kilogram-meter (kgm)

Answer

Meter-kilogram (mkg)

Answer

Joule (J)

Question 6

A person is running at a constant speed. Which of the following forces is NOT acting on the person?

Accepted Answer

Net force

Answer

Gravity

Answer

Friction

Answer

Air resistance

Question 7

A force acting perpendicular to a lever arm will produce:

Accepted Answer

Angular acceleration

Answer

Linear acceleration

Answer

Both linear and angular acceleration

Answer

No acceleration

Question 8

The equation F = ma represents:

Accepted Answer

Newton's second law of motion

Answer

Newton's first law of motion

Answer

Newton's third law of motion

Answer

The law of universal gravitation

Question 9

The direction of the resultant force acting on an object is determined by:

Accepted Answer

The line of action of the forces

Answer

The magnitude of the forces

Answer

The direction of the largest force

Answer

The angle between the forces

Question 10

Which of the following is NOT a factor that affects the angular velocity of an object?

Accepted Answer

Coefficient of friction

Answer

Torque

Answer

Mass

Answer

Radius of gyration

Question 11

The principle of superposition states that:

Accepted Answer

The resultant force acting on an object is the vector sum of all forces acting on it

Answer

The acceleration of an object is directly proportional to the net force acting on it

Answer

The velocity of an object is constant if the net force acting on it is zero

Answer

The momentum of an object is conserved in an isolated system

Question 12

Which of the following is a unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Kilogram

Question 13

The moment of inertia of a body is a measure of its:

Accepted Answer

Resistance to angular acceleration

Answer

Linear momentum

Answer

Angular momentum

Answer

Kinetic energy

Question 14

Which of the following is NOT one of Isaac Newton's fundamental laws of motion?

Accepted Answer

The force of gravity between two objects is inversely proportional to the square of the distance between them.

Answer

An object at rest will remain at rest until acted upon by an unbalanced force.

Answer

The acceleration of an object is directly proportional to the net force acting upon it.

Answer

For every action, there is an equal and opposite reaction.

Question 15

In the International System of Units (SI), the standard unit for measuring force is:

Accepted Answer

Newton (N)

Answer

Meter (m)

Answer

Kilogram (kg)

Answer

Second (s)

Question 16

The equation that defines linear momentum is:

Accepted Answer

p = mv

Answer

F = ma

Answer

W = Fd

Answer

τ = rF

Question 17

Which of the following factors influences the moment of inertia of a body?

Accepted Answer

Mass distribution

Answer

Acceleration

Answer

Velocity

Question 18

The relationship between angular displacement (θ) and angular velocity (ω) is defined by the equation:

Accepted Answer

ω = dθ/dt

Answer

a = dv/dt

Answer

v = dx/dt

Answer

F = ma

Question 19

Work (W) is defined by the equation:

Accepted Answer

W = Fd

Answer

τ = rF

Answer

E = mc^2

Answer

P = Fv

Question 20

A sprinter accelerates from rest to a speed of 10 meters per second in 2 seconds. What is the sprinter's average acceleration?

Accepted Answer

5 m/s²

Answer

0.5 m/s²

Answer

10 m/s²

Answer

20 m/s²

Question 21

Which of Newton's Laws explains why a soccer ball, once kicked, continues moving in a straight line at a constant speed if no other forces act on it?

Accepted Answer

Newton's First Law (Law of Inertia)

Answer

Newton's Third Law (Action-Reaction)

Answer

Law of Universal Gravitation

Answer

Newton's Second Law (Force = Mass x Acceleration)

Question 22

A long jumper takes off with a horizontal velocity of 8 m/s and a vertical velocity of 4 m/s. What is the magnitude of the jumper's resultant velocity at takeoff?

Accepted Answer

8.9 m/s

Answer

8 m/s

Answer

4 m/s

Answer

12 m/s

Question 23

A figure skater spins with their arms extended. When they pull their arms in close to their body, their angular velocity increases. This is an example of:

Accepted Answer

Conservation of Angular Momentum

Answer

Newton's Second Law (Force = Mass x Acceleration)

Answer

Newton's First Law (Law of Inertia)

Answer

Newton's Third Law (Action-Reaction)

Question 24

Which of the following actions would increase the moment of inertia of a dancer performing a pirouette?

Accepted Answer

Extending their arms and legs

Answer

Pulling their arms and legs in close to their body

Answer

Increasing their angular velocity

Answer

Decreasing their mass

Question 25

During a vertical jump, the ground exerts an upward force on the athlete. This force is an example of:

Accepted Answer

Ground reaction force

Answer

Friction force

Answer

Air resistance

Answer

Gravity

Question 26

A swimmer pushes off the wall of the pool, creating a forward force on themself. This is due to:

Accepted Answer

Newton's Third Law (Action-Reaction)

Answer

Newton's First Law (Law of Inertia)

Answer

Conservation of Energy

Answer

Newton's Second Law (Force = Mass x Acceleration)