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 24

A cliff railway uses an electric drive to raise a carriage of total mass 800 kg through a vertical height of 30 m in 60 s. The mean input power of the drive is 5.0 kW. Gravitational field strength is 10 N/kg. What is the efficiency of the drive?

[1]

$20%20\%$

$125%125\%$

$8%8\%$

$80%80\%$

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 24

A cliff railway uses an electric drive to raise a carriage of total mass 800 kg through a vertical height of 30 m in 60 s. The mean input power of the drive is 5.0 kW. Gravitational field strength is 10 N/kg. What is the efficiency of the drive?

[1]

$20%20\%$

$125%125\%$

$8%8\%$

$80%80\%$

8 Energy – forces doing work

Question 24

Markscheme

8 Energy – forces doing work

Question 24

Markscheme

8 Energy – forces doing work

Question 24

8 Energy – forces doing work Questions

8 Energy – forces doing work

Question 24

8 Energy – forces doing work Questions