8 Energy – forces doing work

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110

Question 82

F

A machine transfers 2400 J usefully during each cycle. Its efficiency increases from 0.60 to 0.80. How much less input energy is needed for each cycle?

[1]

$J600\ \mathrm{J}$

$J480\ \mathrm{J}$

$J1000\ \mathrm{J}$

$J1600\ \mathrm{J}$

8 Energy – forces doing work

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110

Question 82

F

A machine transfers 2400 J usefully during each cycle. Its efficiency increases from 0.60 to 0.80. How much less input energy is needed for each cycle?

[1]

$J600\ \mathrm{J}$

$J480\ \mathrm{J}$

$J1000\ \mathrm{J}$

$J1600\ \mathrm{J}$

8 Energy – forces doing work

Question 82

Markscheme

8 Energy – forces doing work

Question 82

Markscheme

8 Energy – forces doing work

Question 82

8 Energy – forces doing work Questions

8 Energy – forces doing work

Question 82

8 Energy – forces doing work Questions