Edexcel GCSE (9-1) Physics SP3 Conservation of Energy Test With Mark Scheme 16_17

Test

SP3 Conservation of energy

Time: 40 minutes

24/10/16

Instructions

 Use black ink or ball-point pen.

 Fill in the boxes at the top of this page with your name.  Answer all questions.

 Answer the questions in the spaces provided – there may be more space than you need.  Calculators may be used.

 Any diagrams may NOT be accurately drawn, unless otherwise indicated.

1. A flying squirrel is an animal that can glide through the air.

It spreads out its limbs to stretch a membrane that helps it to glide.

(a) The mass of a flying squirrel is 0.19 kg. It climbs 17 m up a tree.

(i) State the equation linking gravitational potential energy (GPE), mass, g and height. (1) ''''''..''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''..

(ii) Calculate the GPE gained by the squirrel during this climb. (2) ''''''..''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''.. '''''''''''''''''''''''''''''''''''''''''''''''.. GPE = ...J (iii) State the amount of work done against the force of gravity by the squirrel during this climb.

(b) The flying squirrel glides from P to Q with a constant velocity of 13 m/s.

(i) State the equation linking kinetic energy (KE), mass and velocity. (1) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' (ii) Calculate the KE of the squirrel as it glides. (2) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

KE = ... J (iii) The velocity of the squirrel decreases to zero when it reaches the second tree because

(1) A energy is transferred to the surroundings

2. An energy company plans to build a new power station.

The company must decide between two renewable energy projects, a geothermal power station or a solar power station.

Explain how the location and the climate might affect the type of power station that the company

chooses. (4) Location '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' Climate '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

3. The photograph shows a small aeroplane, of mass 600 kg.

This aeroplane has an electric motor powered by fuel cells. Fuel cells use hydrogen gas and provide an electric current.

(a) When the aeroplane is working, the energy changes are (1) A chemical → electrical → kinetic

B electrical → chemical → kinetic C electrical → kinetic → chemical D kinetic → chemical → electrical (b) The velocity of the aeroplane is 28 m/s.

(i) State the equation linking kinetic energy, mass and velocity. (1) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' (ii) Calculate the kinetic energy of the aeroplane. (2) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

(c) The aeroplane takes off and climbs to a height of 1000 m.

Calculate the gravitational potential energy gained by the aeroplane. (2) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

GPE of the aeroplane = ... J (Total for Question = 6 marks)

4. This question is about three different methods used to cook potatoes.

On a traditional cooker, a potato is placed in water in a pan on top of a hot plate.

Describe how energy is transferred from the hot plate to heat up all of the potato. (4) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

5. The photograph shows equipment used for generating electricity from renewable sources.

(a) Complete the sentences using words from the box.

(i) The panel of solar cells transforms

... energy into electrical energy.

(1)

(ii) The wind turbine transforms ...

(b) The Sankey diagram shows the energy transferred by the panel of solar cells.

Show that the efficiency of the panel of solar cells is 12%. (2) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

6. (a) Which of these is a unit for energy? (1) A joule

B kilogram C newton D watt

(b) The diagram shows a cell connected to a lamp.

Use words from the box to complete the sentences.

Each word may be used once, more than once, or not at all. (3)

The cell converts ... energy into ... energy.

The lamp converts this energy into ... energy and ... energy.

(c) This is the Sankey energy diagram for a low energy lamp.

(i) State the equation linking efficiency, useful energy output and total energy input. (1) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' (ii) Calculate the efficiency of the lamp. (2) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

efficiency = ... (Total for question = 7 marks)

7. A golfer practises hitting balls on a golf course.

Ball X rolls along level ground, as shown in the diagram.

(a) Explain why ball X slows down and stops. (2) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' (b) The mass of ball Y is 45 g.

The golfer gives the ball 36 J of kinetic energy when he hits it.

(i) State the equation linking kinetic energy, mass and speed. (1) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' (ii) Calculate the initial speed of ball Y. (4) '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''

Mark scheme

A energy is transferred to the surroundings

(ii)

Q3.

(i)

600 x 10 x 1000; = 6 000 000 (J);

Q6.

Q7.