Make the following conversions.

(a) 1200 mL to L

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1 L
(b) 2 km to cm

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2 cm
(c) 4.3 dg to mg

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3 mg
(d) 24°C to K

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4 K

A cyclist leaves home and rides due east for a distance of 25 km. She returns home on the same bike path.

If the entire trip takes 5 h, what is her average speed?

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1 km/h
What is her displacement?

Enter an exact number.

2 km

Classify the following as examples of static, sliding, or rolling friction.

(a) sledding down a hill

1

static friction sliding friction     rolling friction

(b) sitting in a chair

2

static friction sliding friction     rolling friction

(c) pushing a grocery cart

3

sliding friction static friction     rolling friction

(d) standing on a steep slope

4

sliding friction static friction     rolling friction

(e) rowing a boat

5

rolling friction sliding friction     static friction

A 87 kg diver jumps off a 10 m platform. Calculate how much gravitational potential energy the diver has at the top of the platform and halfway down. For more help, refer to the Math Skill Handbook.
at the top

Enter a number.

1 J
halfway down

Enter a number.

2 J

In which of the following situations is work being done? (Select all that apply.)

Explain your answers.
2