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 15

A powered vehicle lift takes $minutes0.50\ \mathrm{minutes}$ to raise a 1200 kg car through a vertical height of 1.5 m. During this time, the mean input power of the lift is 800 W. Gravitational field strength is 10 N/kg. What is the efficiency of the lift?

[1]

$0.75$

$0.075$

$1.33$

$0.25$

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 15

A powered vehicle lift takes $minutes0.50\ \mathrm{minutes}$ to raise a 1200 kg car through a vertical height of 1.5 m. During this time, the mean input power of the lift is 800 W. Gravitational field strength is 10 N/kg. What is the efficiency of the lift?

[1]

$0.75$

$0.075$

$1.33$

$0.25$

8 Energy – forces doing work

Question 15

Markscheme

8 Energy – forces doing work

Question 15

Markscheme

8 Energy – forces doing work

Question 15

8 Energy – forces doing work Questions

8 Energy – forces doing work

Question 15

8 Energy – forces doing work Questions