Forces can be used to stretch objects. The table shows the results of an experiment that measured the stretching of a spring when weights were added to it. The first one has been done for you. Weight used (N) Length of spring (cm) Extension (cm) 0 24 . 0 0 . 0 2 . 0 24 . 5 0 . 5 4 . 0 25 . 0 6 . 0 25 . 6 8 . 0 26 . 1 Calculate other three values of extension. Use them to complete the table.

Spring can be extended or compressed depends on the direction of the applied force. When weights are added to spring the spring extends as shown in the table. When 4 . 0 N weight us added the spring changes its length from 24 . 0 cm to 24 . 5 cm by extending 0 . 5 cm . Similarly, when 4 N weight is added the length of the spring shows 25 . 0 cm from initial length by extending 1 . 0 cm . When 6 . 0 N weight is added the length of the spring shows 25 . 6 cm from initial length by extending 1 . 6 cm . When 8 N weight is added the length of the spring shows 26 . 1 cm from initial length by extending 2 . 1 cm . Weight used (N) Length of spring (cm) Extension (cm) 0 24 . 0 0 . 0 2 . 0 24 . 5 0 . 5 4 . 0 25 . 0 1 . 0 6 . 0 25 . 6 1 . 6 8 . 0 26 . 1 2 . 1

Forces can be used to stretch objects. The table shows the results of an experiment that measured the stretching of a spring when weights were added to it. The first one has been done for you. Weight used (N) Length of spring (cm) Extension (cm) 0 24 . 0 0 . 0 2 . 0 24 . 5 0 . 5 4 . 0 25 . 0 1 . 0 6 . 0 25 . 6 1 . 6 8 . 0 26 . 1 2 . 1 Look at the values for extension. Suggest why it is important to make careful measurements in this experiment

Spring can be extended or compressed depends on the direction of the applied force. When weights are added to spring the spring extends as shown in the given table. Every weight shows corresponding reading on the reading scale. The readings of length of extension represents the increases in length of the spring is uniform or non-uniform. So it is important to observe all the readings.

The table shows the result of an investigation into how much a spring stretches when weights are added. The graph is plotted from this information. Total weight used (N) Length of spring (mm) Extension (mm) 0 250 0 10 256 256 - 250 = 6 20 262 12 30 ________ _____-_____=_____ 40 274 24 The diagram shows a close-up of the reading at the ruler when the load is 30 N . What is the reading? Write your answer in the correct place in the table.

The given table shows the length of the spring corresponding to the weight used. It is observed from the table that for every 10 N of weight the length of the spring increasing length by 6 mm . Therefore, the length of the spring when 30 N is used the length of the spring becomes 268 mm . Total weight used (N) Length of spring (mm) Extension (mm) 0 250 0 10 256 256 - 250 = 6 20 262 12 30 268 40 274 24

EASY

Lower Secondary Stage 7

IMPORTANT

Earn 100

We can show forces using arrows. The length of the arrow shows the size of the force.
Complete the diagram by answering the question.

The door is closed and cannot move. The door must push back on the person with the same size of force. On the same diagram, draw the force of the door pushing on the person.

Important Questions on Forces and Their Effects

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 3

The diagram show badly drawn forces. Explain what is wrong with diagram.

Question Image

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 3

The diagram show badly drawn forces. Explain what is wrong with diagram.

Question Image

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 3

The diagram show badly drawn forces. Explain what is wrong with diagram.

Question Image

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 4

A ball on a snooker table travels fast in a straight line until it hits a cushion on the edge of the table. The ball bounces back off the cushion and slows down.

Choose the two best sentences that describe we can conclude.

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 5

Which of the following devices used to measure force. Choose the best device.

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 6

Forces can be used to stretch objects. The table shows the results of an experiment that measured the stretching of a spring when weights were added to it. The first one has been done for you.

Weight used (N)	Length of spring (cm)	Extension (cm)
$0$	$24.0$	$0.0$
$2.0$	$24.5$	$0.5$
$4.0$	$25.0$
$6.0$	$25.6$
$8.0$	$26.1$

Calculate other three values of extension. Use them to complete the table.

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 6

Forces can be used to stretch objects. The table shows the results of an experiment that measured the stretching of a spring when weights were added to it. The first one has been done for you.

Weight used (N)	Length of spring (cm)	Extension (cm)
$0$	$24.0$	$0.0$
$2.0$	$24.5$	$0.5$
$4.0$	$25.0$	$1.0$
$6.0$	$25.6$	$1.6$
$8.0$	$26.1$	$2.1$

Look at the values for extension. Suggest why it is important to make careful measurements in this experiment

EASY

Lower Secondary Stage 7

IMPORTANT

Cambridge Lower Secondary Science Stage 7 : Workbook>Chapter 10 - Forces and Their Effects>Exercise 1>Q 7

The table shows the result of an investigation into how much a spring stretches when weights are added. The graph is plotted from this information.

Total weight used (N)	Length of spring (mm)	Extension (mm)
$0$	$250$	$0$
$10$	$256$	$256 - 250 = 6$
$20$	$262$	$12$
$30$	________	_____-_____=_____
$40$	$274$	$24$

Question Image

The diagram shows a close-up of the reading at the ruler when the load is $30 N$ .

What is the reading? Write your answer in the correct place in the table.

Important Questions on Forces and Their Effects

Learn and Prepare for any exam you want !