T-Level 2.4 Mechanical science principles

What is the formula for work done when a force is applied to an object moving in the direction of the force?

What unit is used to measure power in the International System of Units (SI)?

• Joule (J)

• Newton (N)

• Watt (W)

• Pascal (Pa)

Which of the following is a correct expression for kinetic energy?

What is the mechanical advantage of a lever with an effort arm of 5 meters and a load arm of 2 meters?

• 0.4

• 2.5

• 10

• 7

Which type of simple machine is characterized by a fulcrum, effort, and load?

• Pulley

• Wheel and axle

• Inclined plane

• Lever

What is the formula for calculating the efficiency of a machine?

• 490 J

• 50 J

• 980 J

• 500 J

Which law of motion explains the concept of action and reaction forces?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• The Law of Conservation of Energy

What is the power output of a machine that does 600 Joules of work in 5 seconds?

• 120 Watts

• 3000 Watts

• 100 Watts

• 30 Watts

In a pulley system, what does a mechanical advantage greater than 1 indicate?

• The output force is greater than the input force.

• The input force is greater than the output force.

• The system is 100% efficient.

• The system does not change the direction of the input force.