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Edexcel | Physics WPH0 | S 10 6 1 | 1 hour 15 minutes

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Q1
Q2
Q3
Q4

2

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A student is investigating kinetic energy. He sets up the apparatus as shown

The trolley starts from rest with the weight close to the pulley and at a height h above

the floor.

2

(a)

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1 Mark

Describe how you would measure the height h. You may add to the diagram if you

wish

metre rule shown to be vertical with set square on floor

OR set square aligned with weight and rule

OR eye level with bottom of weight

2

(b)

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The student records the distance h and the time t it takes for the weight to fall to the

floor. His measurements are shown below.

h = 885 mm

The maximum velocity of the trolley is given by

2

(b) (I)

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1 Mark

Estimate the uncertainty in the value for h. This should relate to your method in

part (a).

Uncertainty in h is 1 or 2 mm (1)

2

(b) (II)

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Estimate the uncertainty in the readings for t.

Uncertainty in t is 0.26 or 0.27 or 0.52 s only

2

(b) (III)

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1 Mark

Calculate the mean maximum velocity.

Maximum velocity =

2

(b) (IV)

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1 Mark

The mass of the trolley is 0.930 kg and the falling weight has a mass of

0.030 kg. Calculate a value for the total maximum kinetic energy of the trolley

and weight.

Maximum kinetic energy =

Calculates value for kinetic energy

Example of calculation

2

(b) (V)

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2 Mark s

Estimate the percentage uncertainty in your calculated value for the kinetic

energy.

Assume the uncertainty in the values of both masses is negligible

Percentage uncertainty =

Calculates % uncertainty in h and t(or v)

Example of calculation

0.11% and 8.6%

Combines % uncertainties

Example of calculation

2 × 0.11% + 2 x 8.6 % = 17 %

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