Year 10 Classical Physics Revision Stage 2

Year 10 Classical Physics Revision – Stage 2

1.  State which of Newtons 3 laws applies to each of the following situations. Also state each of the laws and give your own everyday example for each law.

(i)  A sailing boat experiences a wind shift and is briefly deflected away from its initial direction.

(ii)  A fireman’s hose is turned on very hard and so three fire personnel are required to stop it moving.

(iii)  An elastic band is open up so that it can be placed around a pile of Advanced Physics yr 10 Final Exam Papers. (Of course they all have A grades as they were all taught by Mr Ferrara!)

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3.  A car travelling at 20m/s on a flat and level road begins to climb a hill. (Neglect all resistance forces in the calculations.)

(i)  What will its potential energy be just as it comes to rest?

(ii)  To what vertical height will it have climbed?

(iii)  Theoretical values (above) would not represent actual values. Why?

4.  A building smasher, (you know, a crane with a cable and big bally thing attached to it), swings the ball forward. If the mass of the ball is 700kg and is travelling at 20m/s at the bottom of the arc, what height will the ball reach?

5.  Your school bags weigh 10kg. How much work do you do in lifting your bag during one day? (Assume that you lift it from the floor on every occasion (1.3m), and that you lift it 6 times during the day.)

6.  How much work is required to shift a 250g book from a desk 0.7m above the floor to a position on a shelf 1.3m above the desk?

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8.  A pump is required to transfer 1.3 tonnes of water through a vertical height of 4.5m to an overhead storage tank in 6.0 minutes. What is the power of the pump required to complete this job?

9.  A power drill turns the bit through 5m in 10s. If it does 95 joules of work, what force was applied?

10.  What work is done when a 14.7kg body is accelerated at 5m/s2 for 5m.

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12.  There are 2 conveyer belts. They are both moving the same mass of Bauxite to the same height. However, one shifts the mass 5 second faster. From your understanding of Ep, Ek, work and power, what will be the same and what will be different between the two belts?

13.  Using the following description for a falling basketball, show how all of the stored potential energy is converted into kinetic energy during the fall. Compare the theoretical and actual values and explain why they are not the same. Also describe a situation in which they would be the same for this situation.

A basketball weighing 1.7kg is dropped from balcony 20m high and

allowed to free fall to the ground. A number of students using timers

calculated that on average it took 1.8s to reach the ground.

14.  Plot the following results onto graph paper and answer the questions that follow.

(i)  What law does this graph represent and what does the law mean?

(ii)  Calculate the resistance of the circuit.

(iii)  Draw and label a circuit diagram that you could use to determine the values in the table.

15.  What potential difference will occur across a wire of resistance 1.5ohm through which passes a current of 5A?

16.  Determine the current drawn by a 500 ohm electric guitar from a 250v power supply.

17.  An electric kettle requires a potential difference of 250v. If it draws 4 amps what is its resistance?

18.  Determine the components, arrangements, and characteristics for the following circuit diagrams.

19.  One of the circuits has a component that is incorrectly positioned. Which circuit is it and how should it be placed to correct this problem.