A 20 N force is applied to a block, causing it to move 3 m to the right. Calculate the work done on the block.
Solution:
GPE = m × g × h
where m is the mass of the object, g is the acceleration due to gravity (approximately 9.8 m/s^2), and h is the height of the object above the ground. A 20 N force is applied to a
KE = ½ × m × v^2
Now, let's apply the concepts we've learned to Aktiviti 13 in the Buku Teks Fizik Tingkatan 4 KSSM.
Work is defined as the product of the force applied to an object and the displacement of the object in the direction of the force. Mathematically, work (W) is represented by the equation: KE = ½ × m × v^2 Now,
Solution:
Then, calculate the efficiency:
First, calculate the work done:
Gravitational potential energy is the energy an object possesses due to its height above the ground. The gravitational potential energy (GPE) of an object is given by the equation:
A machine requires an input energy of 2000 J to lift a 50 kg load to a height of 2 m. If the machine takes 5 seconds to lift the load, calculate its efficiency.
W = F × s = 20 N × 3 m = 60 J
In this guide, we've explored the concepts of work, energy, and efficiency in the context of physics. We've also applied these concepts to Aktiviti 13 in the Buku Teks Fizik Tingkatan 4 KSSM. By understanding these concepts, students can develop a deeper appreciation for the relationships between force, displacement, energy, and efficiency.
where F is the force applied and s is the displacement of the object.
