# Practice MCQs For Force and Turning Effect Of Forces

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This quiz contains practice questions for GCE ‘O’ level topic: Forces and Turning effect of forces. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

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1. A spring extends by 4 cm when 10 N is suspended from it. Two of these springs are used as shown to carry a 30 N load.

What is the extension of each spring?
2. The graph shows how the length of the spring varies with the load. A load is hung on the spring, which causes the spring to extend by 4 cm. What is the balance reading?

3.

What is the resultant force?
4. A driver's foot presses with a steady force of 20 N on a pedal in a car as shown in the figure below.

What is the force F pulling on the piston?

5. A car is designed to be stable.

To achieve good stability, where is the centre of mass of the car?
6. When a resultant force of 6.0 N is applied to a mass of 3.0 kg, the acceleration of the mass will be ___________.
7. A car of mass 1500 kg is towing a trailer of mass 1100 kg along a level road. The acceleration of the car is $1.30 \text{ ms}^{2}$.

Ignoring friction and air resistance, what is the driving force on the car?
8. A body is moving in a straight line under the action of a constant force. What change will occur to the body?
9. A body on a horizontal frictionless surface is acted upon by a 5 N force towards the right, and another 5 N force towards the left. Which of the following CANNOT describe the body's motion? (i.e. which of the scenarios is IMPOSSIBLE.)
10. Which of the following statements is correct?

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