Mechanical Principles - T Level Text Book

What is the practical application of Newton’s three laws of motion, including appropriate calculations?

• Newton's laws are used to design vehicles and predict their motion.

• Newton's laws are irrelevant in modern physics.

• Newton's laws only apply to celestial bodies.

• Newton's laws are used only in theoretical physics.

To calculate different types of loads on beams, one must consider:

• Material properties and cross-sectional area

• Length and support conditions

• Type of load and its distribution

• All of the above

How can you use equations of motion to calculate displacement, velocity, and uniform linear acceleration relating to falling objects and collisions between two objects in line?

• By applying Newton's laws of motion

• By considering the conservation of energy

• By analyzing the forces involved

What is meant by tractive effort, braking force, frictional resistance, rotational kinetic energy, moment of inertia, mechanical work, and power in practical applications (flywheels, springs, height, pressurised fluids)?

• Tractive effort is the force exerted by a vehicle's engine to move it forward.

• Braking force is the force applied to stop a moving vehicle.

• Frictional resistance is the force that opposes motion between two surfaces in contact.

• Rotational kinetic energy is the energy due to the rotation of an object.

• Moment of inertia is the resistance of an object to changes in its rotational motion.

What are the function and relative advantages of alternative power sources and examples of their use, including solar, hydro, wind, biofuel, geothermal, electric motors, internal combustion, fossil fuels, and nuclear?

• Solar, hydro, and wind are renewable energy sources with low environmental impact.

• Biofuel and geothermal are non-renewable and have high emissions.

• Electric motors and internal combustion engines are the same in terms of efficiency.

• Fossil fuels and nuclear power are the most sustainable energy sources.

Newton's first law of motion states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by a(n) ________.

• balanced force

• unbalanced force

• gravitational force

• magnetic force

According to Newton's second law of motion, the acceleration of an object depends on which two factors?

• Mass and force

• Velocity and time

• Distance and speed

• Energy and power

A rally car has a mass of 1320 kg. What is the acceleration of the car when a force of 4500 N is applied to it?

• 3.41 m/s²

• 3.50 m/s²

• 3.25 m/s²

• 3.75 m/s²

Newton's third law of motion states that:

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

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• Energy cannot be created or destroyed.

Newton's first law of motion is sometimes referred to as the law of ________.

• inertia

• motion

• gravity

• action