Complete the table. Quantity Symbol SI unit F m a

The force acting on an object is defined as the product of mass and acceleration of the object and the SI unit of force is N . Mass of an object is defined as the inertia offered by the body and also it do not change its value anywhere in the universe. Acceleration is defined as the rate of change of velocity of a body. Quantity Symbol SI unit Force F N Mass m kg Acceleration a m s - 2

E M B I B E

Physics for Cambridge IGCSE workbook>Chapter 3 - Forces and Motion>Exercise 3.4>Q 1

EASY

Upper Secondary-IGCSE

IMPORTANT

Earn 100

State the name of the instrument we use in the laboratory to measure weight.

Important Questions on Forces and Motion

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 3 - Forces and Motion>Exercise 3.4>Q 2

State the accepted value of the gravitational field strength on Earth.

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 3 - Forces and Motion>Exercise 3.4>Q 3

It is often said that astronauts are weightless in the International Space Station, which orbits just outside the atmosphere. State whether you think is true. Explain your answer.

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 3 - Forces and Motion>Exercise 3.4>Q 4

When a man is indoor skydiving, he will be floating, stationary. Imagine the same man to be floating in deep space. Compare the forces required for him to move horizontally in a building on Earth and in deep space. Ignore any differences due to the suit. Explain your answer.

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 3 - Forces and Motion>Exercise 3.4>Q 5

Imagine a creature that lives on Jupiter came to Earth and competed in the Olympic high jump. Consider how likely they are to perform against human competitors and explain your answer. (

g = 9.81 m s^{- 2}

)

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 3 - Forces and Motion>PEER ASSESSMENT>Q 1

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The spacing between the dots in the figure increases gradually. State what tells you about the speed of the falling object.

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 3 - Forces and Motion>Exercise 3.5>Q 2

Add dots onto the diagram below to show the pattern you would expect to find for an object with greater mass, but same surface area at same intervals of time.

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