The document provides 7 work problems and 7 power problems to solve using the GRESA (Given, Requirement, Equation, Substitute, Answer) format. The work problems involve calculating work done by various forces moving objects different distances, as well as lifting objects vertically. The power problems involve calculating power using work and time for tasks like climbing stairs, lifting boxes, and pushing objects. Students are asked to show their work and solutions using the GRESA problem-solving method.

1. Assessment Objective:
 Compute for work and power using GRESA format.
Direction: Compute for the work and power of the given situations. Use GRESA format in
showing your solution.
WORK it OUT!
1. A student was rolling a pencil on the table when startled by the teacher calling
their name. They pushed it off and it fell to the floor. Calculate the work done by a
47 N force pushing a pencil 0.26 m across the table.
2. Tommy hated tuna fish. When opening his sack lunch he discovered that his dad had
packed tuna for his lunch! In disgust, he pushed the sandwich to his friend Carl.
Calculate the work done by a 2.4 N force pushing a 410 g sandwich across a table
0.75 m wide.
3. David’s job requires him to stack bags of potatoes at the store. For each bag of
potatoes, how much work is it to lift a 22 N sack of potatoes vertically 6.5 m?
4. A girl pushes her little brother on the sled with a force of 300 N for 750 m. If he
pushed her the same distance and his force was 200 N, how much work did they
each perform?
5. A 75.0 kg teenager pushes on a 500,000 N wall for 250 s but it does not move. How
much work does he do on the wall?
6. A deflated hot-air balloon weighs a total of 8000 N. Filled with hot air, the balloon
rises to a height of 1000 m. How much work is accomplished by the hot air?
7. How much work is done on a small car if a 3150 N force is exerted to move it 75.5 m
to the side of the road?
POWER
1. A student who weighs 520 Newtons climbed the stairs from the first floor to the
third floor, 15 meters above, in 25 seconds. What was her power?
2. A box is pushed across the floor for a distance of 5.0 meters with a force of 55
Newtons in 5.0 seconds. What is the power?
3. If it takes 59 seconds to lift 18 Newtons of books to a height of 7.0 meters,
calculate the power required.
4. A box that weighs 375 N is lifted a distance of 35.0 m straight up by a cable
attached to a motor. The job is done in 5.0 seconds. What power is developed by
the motor in watts?
5. A set of pulleys is used to lift a piano weighing 1,130 newtons. The piano is lifted
3.0 meters in 65 seconds. How much power is used?
6. How much power is used if a force of 35 newtons is used to push a box a distance of
12 meters in 5.0 seconds?
7. What is the power of a kitchen blender if it can perform 3,750 joules of work in 15
seconds?
Student Name: CN 1st
Term SY 2018 - 2019
Level: Grade 8 Date: Parent’s Signature
Subject: Science Teacher: Armand Anthony L. Galicia
Formative Assessment – Drills Unit/Topic: Work and Power

2. WORK
ITEM 1 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]
ITEM 2 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]
ITEM 3 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation [1 pt] Answer[1 pt]
ITEM 4 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]

3. ITEM 5 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]
POWER
ITEM 1 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]
ITEM 2 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]
ITEM 3 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]

4. ITEM 4 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]
ITEM 5 Solution [2 pts]
Given [1 pt]
Requirement[1 pt]
Equation[1 pt] Answer[1 pt]
Padua,A. L.,& Crisostomo,R.M. (2010). Practicaland Explorational- Physics - ModularApproach. Vibal
PublishingHouse,Inc.