ay naka tulog
What is the SI unit of work?
JOULE (J)
What is the formula for work?
W = F × d
A force of 10N moves an object 5m.How much work is done?
50 JOULES/50J
A machine does 200J of work in 10 seconds. What is its power?
20W
A person pushes a box with 30 N of force for 4 m.How much work is done?
120 JOULES/120 J
A 20 N force moves an object 8 m. Calculate the work.
160 J
A motor does 600 J of work in 30 seconds. What is its power?
20 Watts / 20W
Ana pushes a grocery cart with a force of 15 N for 4 meters. How much work does Ana do?
What is potential energy?
A. Energy caused by motion
B. Stored energy due to an object’s position or height
C. Energy used per second
D. Force multiplied by distance
B. Stored energy due to an object’s position or height
What is kinetic energy?
A. Energy stored because of an object’s height
B. Energy produced by a machine
C. Energy possessed by an object because of its motion
D. Energy transferred through heat
C. Energy possessed by an object because of its motion
A 6 kg object is placed on a shelf 4 m above the ground. Using g = 10 m/s², what is its potential energy?
240 J
A student pulls a box with a force of 50 N. The box moves 8 m in 4 seconds. What is the student’s power?
100 W
A 4 kg ball is moving at 5 m/s. What is its kinetic energy?
50J
Which formula is used to calculate kinetic energy?
KE = ½mv²
What is the SI unit of work and energy?
Joule
A worker pushes a 25 kg crate with a force of 150 N. The crate moves 12 m in 6 seconds. What are the work done AND power produced?
1,800 J 300 W
A 20 kg box is lifted 5 m in 10 seconds. Using g = 10 m/s², what power is needed to lift the box?
100 W
A person pushes a wall with a force of 100 N, but the wall does not move. How much work is done on the wall?
0 J
A student pulls a box with a force of 50 N. The box moves 8 m in 4 seconds. What is the student’s power?
100 W
A delivery worker pushes a 30 kg package with a force of 120 N across a warehouse. The package travels 15 meters in 10 seconds. What is the worker’s power?
180 W