EXSC198-Week 1

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1 point

Energy expenditure during exercise is estimated at

21kJ/L O2

17 kJ/L O2

70 kJ/L O2

1 point

I used 2500J of energy to perform 250J of work during football training. What is my percentage net efficiency?

25%

10%

20%

1 point

The law of energy conservation states that

energy is neither created nor destroyed but transferred from one form to another

energy is created and then destroyed after it has been used

energy is created created but not destroyed as it transforms from one form to another

1 point

I am doing a 10kg barbell shoulder press. I will lift it 1.3m. What would my work (J) too?

127.53J

98.1J

74.46J

1 point

If you exercise at an oxygen consumption of 3.5L/min, what is you energy expenditure per minute?

71 kJ/min

73.5 kJ/min

68 kJ/min

1 point

Work =

force x distance

force x N

mass x distance

1 point

Power = work/time. If I go for a 30 min run and my total work output is 50,000J, my power output is

27.78W

1666.67W

1 point

If mass= 3kg, N is equal to:

29.43N

24.93N

26.2N

9.81N

1 point

The release of potential energy can be seen as

muscles develop force

heat is generated

the kinetic energy of the human body used in sport

10.

1 point

What is the force required to generate a power output of 150W when pedalling at 50rpm for 1 min?

20N

30N

10N

11.

1 point

If I am cycling on the Monark at a speed of 85rpm and a force of 25N for 1 min, what is the power output?

212.5W

3.54W

12750W

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