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Unit Test Force and Friction

The document discusses forces acting on various objects like a truck, helicopter, rope, and car. It contains diagrams of these scenarios and questions about identifying forces, directions, and calculating net forces. Students are asked to analyze diagrams, explain scenarios, and determine things like which forces are equal and net force magnitudes and directions in different situations.

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Didi Prayogo
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105 views3 pages

Unit Test Force and Friction

The document discusses forces acting on various objects like a truck, helicopter, rope, and car. It contains diagrams of these scenarios and questions about identifying forces, directions, and calculating net forces. Students are asked to analyze diagrams, explain scenarios, and determine things like which forces are equal and net force magnitudes and directions in different situations.

Uploaded by

Didi Prayogo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Force and friction Assessment

1. The diagram shows a moving truck. Force A, B, C and D are acting on the truck.

Draw a line from each force to its name. the first one has done for you. [2]

2. The diagram shows a helicopter in the air. The arrows show the directions of the four forces which can act on it.

(a) Two of the forces must be equal for the helicopter to stay at the same height. Which two forces?

force ……………. And force……………. [1]

(b) Draw an arrow on this diagram to show which direction the helicopter will move. [1]
(c) The helicopter is now on the ground and the engine is turned off. It is on level ground and there is no wind
blowing.
The next diagram shows the direction of one force, C, acting on the helicopter.

(i) Write down the name given to force C. ……………… [1]

(ii) One other force is acting on the helicopter when it is on the ground.
Draw an arrow on the diagram to show the direction of this other force. [1]

3. Andy and James are pulling on a rope. The size and direction of their pulling forces are shown.

(a) The rope does not move toward Andy or James. Explain why the rope does not move.
______________________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________

(b) Andy keeps pulling with the same force of 100 N. The rope now starts to move towards him.
What must have happened to the pulling force from James?

4. A truck is moving forward. Forces act on the truck.

What happens to the truck? Circle the correct answer


does not move
moves backwards
turns left
speeds up
slows down

[1]
5. A car is driving along the road.

Complete the sentences about the car.


Use words from the list
Air resistance
Chemical
Elastic
Friction
Gravity
Kinetic
The car is slowing down. The forces that slows the car down are
………………… and ………………..

6. Find the net force for every single of diagram below.

[8]
7. A boy pulls a wagon with a force of 6 N East as another boy pushes it with a force of 4 N East.
What is the net force and in what direction is it going?

8. Mr. Muna and his wife were trying to move their new chair. Mr. Smith pulls with a force of 30 N while Mrs. Muna pushes
with a force of 25 N in the same direction. What is the net force?

9. Classes are playing tug of war. Mrs. Zizi homeroom pulls with a force of 50 N.
Ms. Hanin homeroom pulls with a force of 45 N in the opposite direction.
What is the net force? And, who won?

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