8 Energy – forces doing work

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Question 96

H

A machine does useful work $E\,$ in time $t$ . A second machine does $1.5E\,$ of useful work in time $0.60 t$ . What is the ratio of the useful power of the second machine to that of the first?

[1]

$0.90$

$2.50$

$1.90$

$0.40$

8 Energy – forces doing work

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Question 96

H

A machine does useful work $E\,$ in time $t$ . A second machine does $1.5E\,$ of useful work in time $0.60 t$ . What is the ratio of the useful power of the second machine to that of the first?

[1]

$0.90$

$2.50$

$1.90$

$0.40$

8 Energy – forces doing work

Question 96

Markscheme

8 Energy – forces doing work

Question 96

Markscheme

8 Energy – forces doing work

Question 96

8 Energy – forces doing work Questions

8 Energy – forces doing work

Question 96

8 Energy – forces doing work Questions