Work and Power Problems

Front

What is the definition of work in physics?

Back

Work is defined as the product of the force applied to an object and the distance the object moves in the direction of the force. It is calculated using the formula: Work (W) = Force (F) × Distance (d).

Front

What is the formula for calculating power?

Back

Power is defined as the rate at which work is done. It is calculated using the formula: Power (P) = Work (W) / Time (t).

Front

How do you calculate the power generated when lifting an object?

Back

Power can be calculated by dividing the work done (in joules) by the time taken (in seconds) to lift the object. P = W / t.

Front

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

Back

The unit of work in SI is the Joule (J).

Front

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

Back

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

Front

If a force of 10 N moves an object 5 m, how much work is done?

Back

Work done = Force × Distance = 10 N × 5 m = 50 J.

Front

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

Back

Work is directly proportional to both the force applied and the distance moved in the direction of the force.

Front

How much power is generated if 200 J of work is done in 10 seconds?

Back

Power = Work / Time = 200 J / 10 s = 20 W.

Front

What is the significance of the term 'net force' in work problems?

Back

Net force is the total force acting on an object after all the forces are combined. It determines the acceleration and the work done on the object.

Front

How do you determine the distance an object can be lifted with a given amount of work?

Back

Distance can be calculated using the formula: Distance (d) = Work (W) / Force (F).