SUMMARY
The work done by a person lifting a 5.5 kg cement block a vertical distance of 1.2 m is calculated using the formula W = F × d, where F is the force (weight of the block) and d is the distance lifted. The force exerted by gravity is 54.0 N (5.5 kg × 9.8 m/s²). The work done against gravity is 64.8 J (54.0 N × 1.2 m). When carrying the block horizontally for 7.3 m, the work done by the person is zero since the force of gravity acts vertically and does not contribute to horizontal displacement.
PREREQUISITES
- Understanding of Newton's laws of motion
- Familiarity with the concept of work in physics
- Knowledge of force and weight calculations
- Basic grasp of vector components and dot products
NEXT STEPS
- Study the principles of work and energy in physics
- Learn about vector components and their applications in physics
- Explore the concept of gravitational force and its calculations
- Investigate real-world applications of work in lifting and carrying objects
USEFUL FOR
Students studying physics, educators teaching mechanics, and professionals involved in physical labor or engineering applications related to force and work calculations.