8 Energy – forces doing work

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Question 45

A powered theatre fly system raises a scenery panel vertically through 4.0 m at constant speed. During the lift, the motor of the fly system transfers 7.2 kJ of energy. The thermal energy stores of the motor, pulleys and surroundings gain 1.2 kJ. The rest of the energy is transferred to the gravitational potential energy store of the panel and Earth.

What is the weight of the scenery panel?

[1]

$N1500\ \mathrm{N}$

$N2100\ \mathrm{N}$

$N1800\ \mathrm{N}$

$N300\ \mathrm{N}$

8 Energy – forces doing work

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Question 45

A powered theatre fly system raises a scenery panel vertically through 4.0 m at constant speed. During the lift, the motor of the fly system transfers 7.2 kJ of energy. The thermal energy stores of the motor, pulleys and surroundings gain 1.2 kJ. The rest of the energy is transferred to the gravitational potential energy store of the panel and Earth.

What is the weight of the scenery panel?

[1]

$N1500\ \mathrm{N}$

$N2100\ \mathrm{N}$

$N1800\ \mathrm{N}$

$N300\ \mathrm{N}$

8 Energy – forces doing work

Question 45

Markscheme

8 Energy – forces doing work

Question 45

Markscheme

8 Energy – forces doing work

Question 45

8 Energy – forces doing work Questions

8 Energy – forces doing work

Question 45

8 Energy – forces doing work Questions