Work and Power Problems

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

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

Back

The unit of work is the Joule (J).

Front

If a force is applied in the same direction as the motion, what is the angle θ in the work formula?

Back

θ = 0 degrees.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

What is the definition of power in physics?

Back

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

Front

What is the formula for calculating power?

Back

Power (P) = Work (W) / Time (t).

Front

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

Back

The unit of power is the Watt (W), where 1 Watt = 1 Joule/second.

Front

How does increasing power affect time when performing work?

Back

If power increases, the time taken to do the same amount of work decreases.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object (measured in kilograms), while weight is the force exerted by gravity on that mass (measured in Newtons).

Front

What is the formula for calculating weight?

Back

Weight (W) = Mass (m) × Gravitational acceleration (g), where g is approximately 9.81 m/s² on Earth.