Work and Power Practice

Front

What is work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. It is calculated using the formula: Work = Force × Distance.

Front

What is the unit of work?

Back

The unit of work is the Joule (J), which is equivalent to one Newton meter (N·m).

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred over time. It is calculated using the formula: Power = Work / Time.

Front

What is the unit of power?

Back

The unit of power is the Watt (W), which is equivalent to one Joule per second (J/s).

Front

What happens when the direction of the applied force is opposite to the direction of motion?

Back

Negative work is done when the direction of the applied force is anti-parallel (opposite) to the direction of motion.

Front

How does increasing work while decreasing time affect power?

Back

Increasing work while decreasing time results in more power, as power is directly proportional to work and inversely proportional to time.

Front

How do you calculate the time needed to produce a certain amount of work with a given power?

Back

Time can be calculated using the formula: Time = Work / Power.

Front

If 68 Joules are used to move a crate with a force of 4 Newtons, how do you find the distance moved?

Back

Distance can be calculated using the formula: Distance = Work / Force.

Front

What is the formula to calculate power exerted when force, distance, and time are known?

Back

Power can be calculated using the formula: Power = (Force × Distance) / Time.

Front

What is the relationship between work, force, and distance?

Back

Work is the product of force and the distance moved in the direction of the force, expressed as Work = Force × Distance.